Kazu Zamasu
Official mbed Real Time Operating System based on the RTX implementation of the CMSIS-RTOS API open standard.
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mbed-rtos
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mbed official
Diff: rtx/rt_CMSIS.c
- Revision:
- 6:350b53afb889
- Child:
- 10:fcb1f103f7a1
diff -r 9654a71f5a90 -r 350b53afb889 rtx/rt_CMSIS.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/rt_CMSIS.c Fri Nov 23 09:57:31 2012 +0000
@@ -0,0 +1,1918 @@
+/*----------------------------------------------------------------------------
+ * RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ * Name: rt_CMSIS.c
+ * Purpose: CMSIS RTOS API
+ * Rev.: V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * - Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#define __CMSIS_GENERIC
+
+#if defined (__CORTEX_M4) || defined (__CORTEX_M4F)
+ #include "core_cm4.h"
+#elif defined (__CORTEX_M3)
+ #include "core_cm3.h"
+#elif defined (__CORTEX_M0)
+ #include "core_cm0.h"
+#else
+ #error "Missing __CORTEX_Mx definition"
+#endif
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_Task.h"
+#include "rt_Event.h"
+#include "rt_List.h"
+#include "rt_Time.h"
+#include "rt_Mutex.h"
+#include "rt_Semaphore.h"
+#include "rt_Mailbox.h"
+#include "rt_MemBox.h"
+#include "rt_HAL_CM.h"
+
+#define os_thread_cb OS_TCB
+
+#include "cmsis_os.h"
+
+#if (osFeature_Signals != 16)
+#error Invalid "osFeature_Signals" value!
+#endif
+#if (osFeature_Semaphore > 65535)
+#error Invalid "osFeature_Semaphore" value!
+#endif
+#if (osFeature_Wait != 0)
+#error osWait not supported!
+#endif
+
+
+// ==== Enumeration, structures, defines ====
+
+// Service Calls defines
+
+#if defined (__CC_ARM) /* ARM Compiler */
+
+#define __NO_RETURN __declspec(noreturn)
+
+#define osEvent_type osEvent
+#define osEvent_ret_status ret
+#define osEvent_ret_value ret
+#define osEvent_ret_msg ret
+#define osEvent_ret_mail ret
+
+#define osCallback_type osCallback
+#define osCallback_ret ret
+
+#define SVC_0_1(f,t,...) \
+__svc_indirect(0) t _##f (t(*)()); \
+ t f (void); \
+__attribute__((always_inline)) \
+static __inline t __##f (void) { \
+ return _##f(f); \
+}
+
+#define SVC_1_1(f,t,t1,...) \
+__svc_indirect(0) t _##f (t(*)(t1),t1); \
+ t f (t1 a1); \
+__attribute__((always_inline)) \
+static __inline t __##f (t1 a1) { \
+ return _##f(f,a1); \
+}
+
+#define SVC_2_1(f,t,t1,t2,...) \
+__svc_indirect(0) t _##f (t(*)(t1,t2),t1,t2); \
+ t f (t1 a1, t2 a2); \
+__attribute__((always_inline)) \
+static __inline t __##f (t1 a1, t2 a2) { \
+ return _##f(f,a1,a2); \
+}
+
+#define SVC_3_1(f,t,t1,t2,t3,...) \
+__svc_indirect(0) t _##f (t(*)(t1,t2,t3),t1,t2,t3); \
+ t f (t1 a1, t2 a2, t3 a3); \
+__attribute__((always_inline)) \
+static __inline t __##f (t1 a1, t2 a2, t3 a3) { \
+ return _##f(f,a1,a2,a3); \
+}
+
+#define SVC_4_1(f,t,t1,t2,t3,t4,...) \
+__svc_indirect(0) t _##f (t(*)(t1,t2,t3,t4),t1,t2,t3,t4); \
+ t f (t1 a1, t2 a2, t3 a3, t4 a4); \
+__attribute__((always_inline)) \
+static __inline t __##f (t1 a1, t2 a2, t3 a3, t4 a4) { \
+ return _##f(f,a1,a2,a3,a4); \
+}
+
+#define SVC_1_2 SVC_1_1
+#define SVC_1_3 SVC_1_1
+#define SVC_2_3 SVC_2_1
+
+#elif defined (__GNUC__) /* GNU Compiler */
+
+#define __NO_RETURN __attribute__((noreturn))
+
+typedef uint32_t __attribute__((vector_size(8))) ret64;
+typedef uint32_t __attribute__((vector_size(16))) ret128;
+
+#define RET_pointer __r0
+#define RET_int32_t __r0
+#define RET_osStatus __r0
+#define RET_osPriority __r0
+#define RET_osEvent {(osStatus)__r0, {(uint32_t)__r1}, {(void *)__r2}}
+#define RET_osCallback {(void *)__r0, (void *)__r1}
+
+#define osEvent_type ret128
+#define osEvent_ret_status (ret128){ret.status}
+#define osEvent_ret_value (ret128){ret.status, ret.value.v}
+#define osEvent_ret_msg (ret128){ret.status, ret.value.v, (uint32_t)ret.def.message_id}
+#define osEvent_ret_mail (ret128){ret.status, ret.value.v, (uint32_t)ret.def.mail_id}
+
+#define osCallback_type ret64
+#define osCallback_ret (ret64) {(uint32_t)ret.fp, (uint32_t)ret.arg}
+
+#define SVC_ArgN(n) \
+ register int __r##n __asm("r"#n);
+
+#define SVC_ArgR(n,t,a) \
+ register t __r##n __asm("r"#n) = a;
+
+#define SVC_Arg0() \
+ SVC_ArgN(0) \
+ SVC_ArgN(1) \
+ SVC_ArgN(2) \
+ SVC_ArgN(3)
+
+#define SVC_Arg1(t1) \
+ SVC_ArgR(0,t1,a1) \
+ SVC_ArgN(1) \
+ SVC_ArgN(2) \
+ SVC_ArgN(3)
+
+#define SVC_Arg2(t1,t2) \
+ SVC_ArgR(0,t1,a1) \
+ SVC_ArgR(1,t2,a2) \
+ SVC_ArgN(2) \
+ SVC_ArgN(3)
+
+#define SVC_Arg3(t1,t2,t3) \
+ SVC_ArgR(0,t1,a1) \
+ SVC_ArgR(1,t2,a2) \
+ SVC_ArgR(2,t3,a3) \
+ SVC_ArgN(3)
+
+#define SVC_Arg4(t1,t2,t3,t4) \
+ SVC_ArgR(0,t1,a1) \
+ SVC_ArgR(1,t2,a2) \
+ SVC_ArgR(2,t3,a3) \
+ SVC_ArgR(3,t4,a4)
+
+#if (defined (__CORTEX_M0))
+#define SVC_Call(f) \
+ __asm volatile \
+ ( \
+ "ldr r7,="#f"\n\t" \
+ "mov r12,r7\n\t" \
+ "svc 0" \
+ : "=r" (__r0), "=r" (__r1), "=r" (__r2), "=r" (__r3) \
+ : "r" (__r0), "r" (__r1), "r" (__r2), "r" (__r3) \
+ : "r7", "r12", "lr", "cc" \
+ );
+#else
+#define SVC_Call(f) \
+ __asm volatile \
+ ( \
+ "ldr r12,="#f"\n\t" \
+ "svc 0" \
+ : "=r" (__r0), "=r" (__r1), "=r" (__r2), "=r" (__r3) \
+ : "r" (__r0), "r" (__r1), "r" (__r2), "r" (__r3) \
+ : "r12", "lr", "cc" \
+ );
+#endif
+
+#define SVC_0_1(f,t,rv) \
+__attribute__((always_inline)) \
+static inline t __##f (void) { \
+ SVC_Arg0(); \
+ SVC_Call(f); \
+ return (t) rv; \
+}
+
+#define SVC_1_1(f,t,t1,rv) \
+__attribute__((always_inline)) \
+static inline t __##f (t1 a1) { \
+ SVC_Arg1(t1); \
+ SVC_Call(f); \
+ return (t) rv; \
+}
+
+#define SVC_2_1(f,t,t1,t2,rv) \
+__attribute__((always_inline)) \
+static inline t __##f (t1 a1, t2 a2) { \
+ SVC_Arg2(t1,t2); \
+ SVC_Call(f); \
+ return (t) rv; \
+}
+
+#define SVC_3_1(f,t,t1,t2,t3,rv) \
+__attribute__((always_inline)) \
+static inline t __##f (t1 a1, t2 a2, t3 a3) { \
+ SVC_Arg3(t1,t2,t3); \
+ SVC_Call(f); \
+ return (t) rv; \
+}
+
+#define SVC_4_1(f,t,t1,t2,t3,t4,rv) \
+__attribute__((always_inline)) \
+static inline t __##f (t1 a1, t2 a2, t3 a3, t4 a4) { \
+ SVC_Arg4(t1,t2,t3,t4); \
+ SVC_Call(f); \
+ return (t) rv; \
+}
+
+#define SVC_1_2 SVC_1_1
+#define SVC_1_3 SVC_1_1
+#define SVC_2_3 SVC_2_1
+
+#elif defined (__ICCARM__) /* IAR Compiler */
+
+#define __NO_RETURN __noreturn
+
+#define RET_osEvent "=r"(ret.status), "=r"(ret.value), "=r"(ret.def)
+#define RET_osCallback "=r"(ret.fp), "=r"(ret.arg)
+
+#define osEvent_type osEvent
+#define osEvent_ret_status ret
+#define osEvent_ret_value ret
+#define osEvent_ret_msg ret
+#define osEvent_ret_mail ret
+
+#define osCallback_type uint64_t
+#define osCallback_ret ((uint64_t)ret.fp | ((uint64_t)ret.arg)<<32)
+
+#define SVC_Setup(f) \
+ __asm( \
+ "mov r12,%0\n" \
+ :: "r"(&f): "r12" \
+ );
+
+#define SVC_Ret3() \
+ __asm( \
+ "ldr r0,[sp,#0]\n" \
+ "ldr r1,[sp,#4]\n" \
+ "ldr r2,[sp,#8]\n" \
+ );
+
+#define SVC_0_1(f,t,...) \
+t f (void); \
+_Pragma("swi_number=0") __swi t _##f (void); \
+static inline t __##f (void) { \
+ SVC_Setup(f); \
+ return _##f(); \
+}
+
+#define SVC_1_1(f,t,t1,...) \
+t f (t1 a1); \
+_Pragma("swi_number=0") __swi t _##f (t1 a1); \
+static inline t __##f (t1 a1) { \
+ SVC_Setup(f); \
+ return _##f(a1); \
+}
+
+#define SVC_2_1(f,t,t1,t2,...) \
+t f (t1 a1, t2 a2); \
+_Pragma("swi_number=0") __swi t _##f (t1 a1, t2 a2); \
+static inline t __##f (t1 a1, t2 a2) { \
+ SVC_Setup(f); \
+ return _##f(a1,a2); \
+}
+
+#define SVC_3_1(f,t,t1,t2,t3,...) \
+t f (t1 a1, t2 a2, t3 a3); \
+_Pragma("swi_number=0") __swi t _##f (t1 a1, t2 a2, t3 a3); \
+static inline t __##f (t1 a1, t2 a2, t3 a3) { \
+ SVC_Setup(f); \
+ return _##f(a1,a2,a3); \
+}
+
+#define SVC_4_1(f,t,t1,t2,t3,t4,...) \
+t f (t1 a1, t2 a2, t3 a3, t4 a4); \
+_Pragma("swi_number=0") __swi t _##f (t1 a1, t2 a2, t3 a3, t4 a4); \
+static inline t __##f (t1 a1, t2 a2, t3 a3, t4 a4) { \
+ SVC_Setup(f); \
+ return _##f(a1,a2,a3,a4); \
+}
+
+#define SVC_1_2(f,t,t1,rr) \
+uint64_t f (t1 a1); \
+_Pragma("swi_number=0") __swi uint64_t _##f (t1 a1); \
+static inline t __##f (t1 a1) { \
+ t ret; \
+ SVC_Setup(f); \
+ _##f(a1); \
+ __asm("" : rr : :); \
+ return ret; \
+}
+
+#define SVC_1_3(f,t,t1,rr) \
+t f (t1 a1); \
+void f##_ (t1 a1) { \
+ f(a1); \
+ SVC_Ret3(); \
+} \
+_Pragma("swi_number=0") __swi void _##f (t1 a1); \
+static inline t __##f (t1 a1) { \
+ t ret; \
+ SVC_Setup(f##_); \
+ _##f(a1); \
+ __asm("" : rr : :); \
+ return ret; \
+}
+
+#define SVC_2_3(f,t,t1,t2,rr) \
+t f (t1 a1, t2 a2); \
+void f##_ (t1 a1, t2 a2) { \
+ f(a1,a2); \
+ SVC_Ret3(); \
+} \
+_Pragma("swi_number=0") __swi void _##f (t1 a1, t2 a2); \
+static inline t __##f (t1 a1, t2 a2) { \
+ t ret; \
+ SVC_Setup(f##_); \
+ _##f(a1,a2); \
+ __asm("" : rr : :); \
+ return ret; \
+}
+
+#endif
+
+
+// Callback structure
+typedef struct {
+ void *fp; // Function pointer
+ void *arg; // Function argument
+} osCallback;
+
+
+// OS Section definitions
+#ifdef OS_SECTIONS_LINK_INFO
+extern const uint32_t os_section_id$$Base;
+extern const uint32_t os_section_id$$Limit;
+#endif
+
+// OS Timers external resources
+extern osThreadDef_t os_thread_def_osTimerThread;
+extern osThreadId osThreadId_osTimerThread;
+extern osMessageQDef_t os_messageQ_def_osTimerMessageQ;
+extern osMessageQId osMessageQId_osTimerMessageQ;
+
+
+// ==== Helper Functions ====
+
+/// Convert timeout in millisec to system ticks
+static uint32_t rt_ms2tick (uint32_t millisec) {
+ uint32_t tick;
+
+ if (millisec == osWaitForever) return 0xFFFF; // Indefinite timeout
+ if (millisec > 4000000) return 0xFFFE; // Max ticks supported
+
+ tick = ((1000 * millisec) + os_clockrate - 1) / os_clockrate;
+ if (tick > 0xFFFE) return 0xFFFE;
+
+ return tick;
+}
+
+/// Convert Thread ID to TCB pointer
+static P_TCB rt_tid2ptcb (osThreadId thread_id) {
+ P_TCB ptcb;
+
+ if (thread_id == NULL) return NULL;
+
+ if ((uint32_t)thread_id & 3) return NULL;
+
+#ifdef OS_SECTIONS_LINK_INFO
+ if ((os_section_id$$Base != 0) && (os_section_id$$Limit != 0)) {
+ if (thread_id < (osThreadId)os_section_id$$Base) return NULL;
+ if (thread_id >= (osThreadId)os_section_id$$Limit) return NULL;
+ }
+#endif
+
+ ptcb = thread_id;
+
+ if (ptcb->cb_type != TCB) return NULL;
+
+ return ptcb;
+}
+
+/// Convert ID pointer to Object pointer
+static void *rt_id2obj (void *id) {
+
+ if ((uint32_t)id & 3) return NULL;
+
+#ifdef OS_SECTIONS_LINK_INFO
+ if ((os_section_id$$Base != 0) && (os_section_id$$Limit != 0)) {
+ if (id < (void *)os_section_id$$Base) return NULL;
+ if (id >= (void *)os_section_id$$Limit) return NULL;
+ }
+#endif
+
+ return id;
+}
+
+
+// ==== Kernel Control ====
+
+uint8_t os_initialized; // Kernel Initialized flag
+uint8_t os_running; // Kernel Running flag
+
+// Kernel Control Service Calls declarations
+SVC_0_1(svcKernelInitialize, osStatus, RET_osStatus)
+SVC_0_1(svcKernelStart, osStatus, RET_osStatus)
+SVC_0_1(svcKernelRunning, int32_t, RET_int32_t)
+
+extern void sysThreadError (osStatus status);
+osThreadId svcThreadCreate (osThreadDef_t *thread_def, void *argument);
+osMessageQId svcMessageCreate (osMessageQDef_t *queue_def, osThreadId thread_id);
+
+// Kernel Control Service Calls
+
+/// Initialize the RTOS Kernel for creating objects
+osStatus svcKernelInitialize (void) {
+ if (os_initialized) return osOK;
+
+ rt_sys_init(); // RTX System Initialization
+ os_tsk.run->prio = 255; // Highest priority
+
+ sysThreadError(osOK);
+
+ os_initialized = 1;
+
+ return osOK;
+}
+
+/// Start the RTOS Kernel
+osStatus svcKernelStart (void) {
+
+ if (os_running) return osOK;
+
+ // Create OS Timers resources (Message Queue & Thread)
+ osMessageQId_osTimerMessageQ = svcMessageCreate (&os_messageQ_def_osTimerMessageQ, NULL);
+ osThreadId_osTimerThread = svcThreadCreate(&os_thread_def_osTimerThread, NULL);
+
+ rt_tsk_prio(0, 0); // Lowest priority
+ __set_PSP(os_tsk.run->tsk_stack + 8*4); // New context
+ os_tsk.run = NULL; // Force context switch
+
+ rt_sys_start();
+
+ os_running = 1;
+
+ return osOK;
+}
+
+/// Check if the RTOS kernel is already started
+int32_t svcKernelRunning(void) {
+ return os_running;
+}
+
+// Kernel Control Public API
+
+/// Initialize the RTOS Kernel for creating objects
+osStatus osKernelInitialize (void) {
+ if (__get_IPSR() != 0) return osErrorISR; // Not allowed in ISR
+ if ((__get_CONTROL() & 1) == 0) { // Privileged mode
+ return svcKernelInitialize();
+ } else {
+ return __svcKernelInitialize();
+ }
+}
+
+/// Start the RTOS Kernel
+osStatus osKernelStart (void) {
+ uint32_t stack[8];
+
+ if (__get_IPSR() != 0) return osErrorISR; // Not allowed in ISR
+ switch (__get_CONTROL() & 0x03) {
+ case 0x00: // Privileged Thread mode & MSP
+ __set_PSP((uint32_t)(stack + 8)); // Initial PSP
+ if (os_flags & 1) {
+ __set_CONTROL(0x02); // Set Privileged Thread mode & PSP
+ } else {
+ __set_CONTROL(0x03); // Set Unprivileged Thread mode & PSP
+ }
+ __DSB();
+ __ISB();
+ break;
+ case 0x01: // Unprivileged Thread mode & MSP
+ return osErrorOS;
+ case 0x02: // Privileged Thread mode & PSP
+ if ((os_flags & 1) == 0) { // Unprivileged Thread mode requested
+ __set_CONTROL(0x03); // Set Unprivileged Thread mode & PSP
+ __DSB();
+ __ISB();
+ }
+ break;
+ case 0x03: // Unprivileged Thread mode & PSP
+ if (os_flags & 1) return osErrorOS; // Privileged Thread mode requested
+ break;
+ }
+ return __svcKernelStart();
+}
+
+/// Check if the RTOS kernel is already started
+int32_t osKernelRunning(void) {
+ if ((__get_IPSR() != 0) || ((__get_CONTROL() & 1) == 0)) {
+ // in ISR or Privileged
+ return os_running;
+ } else {
+ return __svcKernelRunning();
+ }
+}
+
+
+// ==== Thread Management ====
+
+__NO_RETURN void osThreadExit (void);
+
+// Thread Service Calls declarations
+SVC_2_1(svcThreadCreate, osThreadId, osThreadDef_t *, void *, RET_pointer)
+SVC_0_1(svcThreadGetId, osThreadId, RET_pointer)
+SVC_1_1(svcThreadTerminate, osStatus, osThreadId, RET_osStatus)
+SVC_0_1(svcThreadYield, osStatus, RET_osStatus)
+SVC_2_1(svcThreadSetPriority, osStatus, osThreadId, osPriority, RET_osStatus)
+SVC_1_1(svcThreadGetPriority, osPriority, osThreadId, RET_osPriority)
+
+// Thread Service Calls
+extern OS_TID rt_get_TID (void);
+extern void rt_init_context (P_TCB p_TCB, U8 priority, FUNCP task_body);
+
+/// Create a thread and add it to Active Threads and set it to state READY
+osThreadId svcThreadCreate (osThreadDef_t *thread_def, void *argument) {
+ P_TCB ptcb;
+
+ if ((thread_def == NULL) ||
+ (thread_def->pthread == NULL) ||
+ (thread_def->tpriority < osPriorityIdle) ||
+ (thread_def->tpriority > osPriorityRealtime) ||
+ (thread_def->stacksize == 0) ||
+ (thread_def->stack_pointer == NULL) ) {
+ sysThreadError(osErrorParameter);
+ return NULL;
+ }
+
+ U8 priority = thread_def->tpriority - osPriorityIdle + 1;
+ P_TCB task_context = &thread_def->tcb;
+
+ /* If "size != 0" use a private user provided stack. */
+ task_context->stack = (U32*)thread_def->stack_pointer;
+ task_context->priv_stack = thread_def->stacksize;
+ /* Pass parameter 'argv' to 'rt_init_context' */
+ task_context->msg = argument;
+ /* For 'size == 0' system allocates the user stack from the memory pool. */
+ rt_init_context (task_context, priority, (FUNCP)thread_def->pthread);
+
+ /* Find a free entry in 'os_active_TCB' table. */
+ OS_TID tsk = rt_get_TID ();
+ os_active_TCB[tsk-1] = task_context;
+ task_context->task_id = tsk;
+ DBG_TASK_NOTIFY(task_context, __TRUE);
+ rt_dispatch (task_context);
+
+ ptcb = (P_TCB)os_active_TCB[tsk - 1]; // TCB pointer
+
+ *((uint32_t *)ptcb->tsk_stack + 13) = (uint32_t)osThreadExit;
+
+ return ptcb;
+}
+
+/// Return the thread ID of the current running thread
+osThreadId svcThreadGetId (void) {
+ OS_TID tsk;
+
+ tsk = rt_tsk_self();
+ if (tsk == 0) return NULL;
+ return (P_TCB)os_active_TCB[tsk - 1];
+}
+
+/// Terminate execution of a thread and remove it from ActiveThreads
+osStatus svcThreadTerminate (osThreadId thread_id) {
+ OS_RESULT res;
+ P_TCB ptcb;
+
+ ptcb = rt_tid2ptcb(thread_id); // Get TCB pointer
+ if (ptcb == NULL) return osErrorParameter;
+
+ res = rt_tsk_delete(ptcb->task_id); // Delete task
+
+ if (res == OS_R_NOK) return osErrorResource; // Delete task failed
+
+ return osOK;
+}
+
+/// Pass control to next thread that is in state READY
+osStatus svcThreadYield (void) {
+ rt_tsk_pass(); // Pass control to next task
+ return osOK;
+}
+
+/// Change priority of an active thread
+osStatus svcThreadSetPriority (osThreadId thread_id, osPriority priority) {
+ OS_RESULT res;
+ P_TCB ptcb;
+
+ ptcb = rt_tid2ptcb(thread_id); // Get TCB pointer
+ if (ptcb == NULL) return osErrorParameter;
+
+ if ((priority < osPriorityIdle) || (priority > osPriorityRealtime)) {
+ return osErrorValue;
+ }
+
+ res = rt_tsk_prio( // Change task priority
+ ptcb->task_id, // Task ID
+ priority - osPriorityIdle + 1 // New task priority
+ );
+
+ if (res == OS_R_NOK) return osErrorResource; // Change task priority failed
+
+ return osOK;
+}
+
+/// Get current priority of an active thread
+osPriority svcThreadGetPriority (osThreadId thread_id) {
+ P_TCB ptcb;
+
+ ptcb = rt_tid2ptcb(thread_id); // Get TCB pointer
+ if (ptcb == NULL) return osPriorityError;
+
+ return (osPriority)(ptcb->prio - 1 + osPriorityIdle);
+}
+
+
+// Thread Public API
+
+/// Create a thread and add it to Active Threads and set it to state READY
+osThreadId osThreadCreate (osThreadDef_t *thread_def, void *argument) {
+ if (__get_IPSR() != 0) return NULL; // Not allowed in ISR
+ if (((__get_CONTROL() & 1) == 0) && (os_running == 0)) {
+ // Privileged and not running
+ return svcThreadCreate(thread_def, argument);
+ } else {
+ return __svcThreadCreate(thread_def, argument);
+ }
+}
+
+/// Return the thread ID of the current running thread
+osThreadId osThreadGetId (void) {
+ if (__get_IPSR() != 0) return NULL; // Not allowed in ISR
+ return __svcThreadGetId();
+}
+
+/// Terminate execution of a thread and remove it from ActiveThreads
+osStatus osThreadTerminate (osThreadId thread_id) {
+ if (__get_IPSR() != 0) return osErrorISR; // Not allowed in ISR
+ return __svcThreadTerminate(thread_id);
+}
+
+/// Pass control to next thread that is in state READY
+osStatus osThreadYield (void) {
+ if (__get_IPSR() != 0) return osErrorISR; // Not allowed in ISR
+ return __svcThreadYield();
+}
+
+/// Change priority of an active thread
+osStatus osThreadSetPriority (osThreadId thread_id, osPriority priority) {
+ if (__get_IPSR() != 0) return osErrorISR; // Not allowed in ISR
+ return __svcThreadSetPriority(thread_id, priority);
+}
+
+/// Get current priority of an active thread
+osPriority osThreadGetPriority (osThreadId thread_id) {
+ if (__get_IPSR() != 0) return osPriorityError;// Not allowed in ISR
+ return __svcThreadGetPriority(thread_id);
+}
+
+/// INTERNAL - Not Public
+/// Auto Terminate Thread on exit (used implicitly when thread exists)
+__NO_RETURN void osThreadExit (void) {
+ __svcThreadTerminate(__svcThreadGetId());
+ for (;;); // Should never come here
+}
+
+
+// ==== Generic Wait Functions ====
+
+// Generic Wait Service Calls declarations
+SVC_1_1(svcDelay, osStatus, uint32_t, RET_osStatus)
+#if osFeature_Wait != 0
+SVC_1_3(svcWait, os_InRegs osEvent, uint32_t, RET_osEvent)
+#endif
+
+// Generic Wait Service Calls
+
+/// Wait for Timeout (Time Delay)
+osStatus svcDelay (uint32_t millisec) {
+ if (millisec == 0) return osOK;
+ rt_dly_wait(rt_ms2tick(millisec));
+ return osEventTimeout;
+}
+
+/// Wait for Signal, Message, Mail, or Timeout
+#if osFeature_Wait != 0
+os_InRegs osEvent_type svcWait (uint32_t millisec) {
+ osEvent ret;
+
+ if (millisec == 0) {
+ ret.status = osOK;
+ return osEvent_ret_status;
+ }
+
+ /* To Do: osEventSignal, osEventMessage, osEventMail */
+ rt_dly_wait(rt_ms2tick(millisec));
+ ret.status = osEventTimeout;
+
+ return osEvent_ret_status;
+}
+#endif
+
+
+// Generic Wait API
+
+/// Wait for Timeout (Time Delay)
+osStatus osDelay (uint32_t millisec) {
+ if (__get_IPSR() != 0) return osErrorISR; // Not allowed in ISR
+ return __svcDelay(millisec);
+}
+
+/// Wait for Signal, Message, Mail, or Timeout
+os_InRegs osEvent osWait (uint32_t millisec) {
+ osEvent ret;
+
+#if osFeature_Wait == 0
+ ret.status = osErrorOS;
+ return ret;
+#else
+ if (__get_IPSR() != 0) { // Not allowed in ISR
+ ret.status = osErrorISR;
+ return ret;
+ }
+ return __svcWait(millisec);
+#endif
+}
+
+
+// ==== Timer Management ====
+
+// Timer definitions
+#define osTimerInvalid 0
+#define osTimerStopped 1
+#define osTimerRunning 2
+
+// Timer structures
+
+typedef struct os_timer_cb_ { // Timer Control Block
+ struct os_timer_cb_ *next; // Pointer to next active Timer
+ uint8_t state; // Timer State
+ uint8_t type; // Timer Type (Periodic/One-shot)
+ uint16_t reserved; // Reserved
+ uint16_t tcnt; // Timer Delay Count
+ uint16_t icnt; // Timer Initial Count
+ void *arg; // Timer Function Argument
+ osTimerDef_t *timer; // Pointer to Timer definition
+} os_timer_cb;
+
+// Timer variables
+os_timer_cb *os_timer_head; // Pointer to first active Timer
+
+
+// Timer Helper Functions
+
+// Insert Timer into the list sorted by time
+static void rt_timer_insert (os_timer_cb *pt, uint32_t tcnt) {
+ os_timer_cb *p, *prev;
+
+ prev = NULL;
+ p = os_timer_head;
+ while (p != NULL) {
+ if (tcnt < p->tcnt) break;
+ tcnt -= p->tcnt;
+ prev = p;
+ p = p->next;
+ }
+ pt->next = p;
+ pt->tcnt = (uint16_t)tcnt;
+ if (p != NULL) {
+ p->tcnt -= pt->tcnt;
+ }
+ if (prev != NULL) {
+ prev->next = pt;
+ } else {
+ os_timer_head = pt;
+ }
+}
+
+// Remove Timer from the list
+static int rt_timer_remove (os_timer_cb *pt) {
+ os_timer_cb *p, *prev;
+
+ prev = NULL;
+ p = os_timer_head;
+ while (p != NULL) {
+ if (p == pt) break;
+ prev = p;
+ p = p->next;
+ }
+ if (p == NULL) return -1;
+ if (prev != NULL) {
+ prev->next = pt->next;
+ } else {
+ os_timer_head = pt->next;
+ }
+ if (pt->next != NULL) {
+ pt->next->tcnt += pt->tcnt;
+ }
+
+ return 0;
+}
+
+
+// Timer Service Calls declarations
+SVC_3_1(svcTimerCreate, osTimerId, osTimerDef_t *, os_timer_type, void *, RET_pointer)
+SVC_2_1(svcTimerStart, osStatus, osTimerId, uint32_t, RET_osStatus)
+SVC_1_1(svcTimerStop, osStatus, osTimerId, RET_osStatus)
+SVC_1_1(svcTimerDelete, osStatus, osTimerId, RET_osStatus)
+SVC_1_2(svcTimerCall, os_InRegs osCallback, osTimerId, RET_osCallback)
+
+// Timer Management Service Calls
+
+/// Create timer
+osTimerId svcTimerCreate (osTimerDef_t *timer_def, os_timer_type type, void *argument) {
+ os_timer_cb *pt;
+
+ if ((timer_def == NULL) || (timer_def->ptimer == NULL)) {
+ sysThreadError(osErrorParameter);
+ return NULL;
+ }
+
+ pt = timer_def->timer;
+ if (pt == NULL) {
+ sysThreadError(osErrorParameter);
+ return NULL;
+ }
+
+ if ((type != osTimerOnce) && (type != osTimerPeriodic)) {
+ sysThreadError(osErrorValue);
+ return NULL;
+ }
+
+ if (osThreadId_osTimerThread == NULL) {
+ sysThreadError(osErrorResource);
+ return NULL;
+ }
+
+ if (pt->state != osTimerInvalid){
+ sysThreadError(osErrorResource);
+ return NULL;
+ }
+
+ pt->state = osTimerStopped;
+ pt->type = (uint8_t)type;
+ pt->arg = argument;
+ pt->timer = timer_def;
+
+ return (osTimerId)pt;
+}
+
+/// Start or restart timer
+osStatus svcTimerStart (osTimerId timer_id, uint32_t millisec) {
+ os_timer_cb *pt;
+ uint32_t tcnt;
+
+ pt = rt_id2obj(timer_id);
+ if (pt == NULL) return osErrorParameter;
+
+ tcnt = rt_ms2tick(millisec);
+ if (tcnt == 0) return osErrorValue;
+
+ switch (pt->state) {
+ case osTimerRunning:
+ if (rt_timer_remove(pt) != 0) {
+ return osErrorResource;
+ }
+ break;
+ case osTimerStopped:
+ pt->state = osTimerRunning;
+ pt->icnt = (uint16_t)tcnt;
+ break;
+ default:
+ return osErrorResource;
+ }
+
+ rt_timer_insert(pt, tcnt);
+
+ return osOK;
+}
+
+/// Stop timer
+osStatus svcTimerStop (osTimerId timer_id) {
+ os_timer_cb *pt;
+
+ pt = rt_id2obj(timer_id);
+ if (pt == NULL) return osErrorParameter;
+
+ if (pt->state != osTimerRunning) return osErrorResource;
+
+ pt->state = osTimerStopped;
+
+ if (rt_timer_remove(pt) != 0) {
+ return osErrorResource;
+ }
+
+ return osOK;
+}
+
+/// Delete timer
+osStatus svcTimerDelete (osTimerId timer_id) {
+ os_timer_cb *pt;
+
+ pt = rt_id2obj(timer_id);
+ if (pt == NULL) return osErrorParameter;
+
+ switch (pt->state) {
+ case osTimerRunning:
+ rt_timer_remove(pt);
+ break;
+ case osTimerStopped:
+ break;
+ default:
+ return osErrorResource;
+ }
+
+ pt->state = osTimerInvalid;
+
+ return osOK;
+}
+
+/// Get timer callback parameters
+os_InRegs osCallback_type svcTimerCall (osTimerId timer_id) {
+ os_timer_cb *pt;
+ osCallback ret;
+
+ pt = rt_id2obj(timer_id);
+ if (pt == NULL) {
+ ret.fp = NULL;
+ ret.arg = NULL;
+ return osCallback_ret;
+ }
+
+ ret.fp = (void *)pt->timer->ptimer;
+ ret.arg = pt->arg;
+
+ return osCallback_ret;
+}
+
+static __INLINE osStatus isrMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec);
+
+/// Timer Tick (called each SysTick)
+void sysTimerTick (void) {
+ os_timer_cb *pt, *p;
+
+ p = os_timer_head;
+ if (p == NULL) return;
+
+ p->tcnt--;
+ while ((p != NULL) && (p->tcnt == 0)) {
+ pt = p;
+ p = p->next;
+ os_timer_head = p;
+ isrMessagePut(osMessageQId_osTimerMessageQ, (uint32_t)pt, 0);
+ if (pt->type == osTimerPeriodic) {
+ rt_timer_insert(pt, pt->icnt);
+ } else {
+ pt->state = osTimerStopped;
+ }
+ }
+}
+
+
+// Timer Management Public API
+
+/// Create timer
+osTimerId osTimerCreate (osTimerDef_t *timer_def, os_timer_type type, void *argument) {
+ if (__get_IPSR() != 0) return NULL; // Not allowed in ISR
+ if (((__get_CONTROL() & 1) == 0) && (os_running == 0)) {
+ // Privileged and not running
+ return svcTimerCreate(timer_def, type, argument);
+ } else {
+ return __svcTimerCreate(timer_def, type, argument);
+ }
+}
+
+/// Start or restart timer
+osStatus osTimerStart (osTimerId timer_id, uint32_t millisec) {
+ if (__get_IPSR() != 0) return osErrorISR; // Not allowed in ISR
+ return __svcTimerStart(timer_id, millisec);
+}
+
+/// Stop timer
+osStatus osTimerStop (osTimerId timer_id) {
+ if (__get_IPSR() != 0) return osErrorISR; // Not allowed in ISR
+ return __svcTimerStop(timer_id);
+}
+
+/// Delete timer
+osStatus osTimerDelete (osTimerId timer_id) {
+ if (__get_IPSR() != 0) return osErrorISR; // Not allowed in ISR
+ return __svcTimerDelete(timer_id);
+}
+
+/// INTERNAL - Not Public
+/// Get timer callback parameters (used by OS Timer Thread)
+os_InRegs osCallback osTimerCall (osTimerId timer_id) {
+ return __svcTimerCall(timer_id);
+}
+
+
+// Timer Thread
+__NO_RETURN void osTimerThread (void const *argument) {
+ osCallback cb;
+ osEvent evt;
+
+ for (;;) {
+ evt = osMessageGet(osMessageQId_osTimerMessageQ, osWaitForever);
+ if (evt.status == osEventMessage) {
+ cb = osTimerCall(evt.value.p);
+ if (cb.fp != NULL) {
+ (*(os_ptimer)cb.fp)(cb.arg);
+ }
+ }
+ }
+}
+
+
+// ==== Signal Management ====
+
+// Signal Service Calls declarations
+SVC_2_1(svcSignalSet, int32_t, osThreadId, int32_t, RET_int32_t)
+SVC_2_1(svcSignalClear, int32_t, osThreadId, int32_t, RET_int32_t)
+SVC_1_1(svcSignalGet, int32_t, osThreadId, RET_int32_t)
+SVC_2_3(svcSignalWait, os_InRegs osEvent, int32_t, uint32_t, RET_osEvent)
+
+// Signal Service Calls
+
+/// Set the specified Signal Flags of an active thread
+int32_t svcSignalSet (osThreadId thread_id, int32_t signals) {
+ P_TCB ptcb;
+ int32_t sig;
+
+ ptcb = rt_tid2ptcb(thread_id); // Get TCB pointer
+ if (ptcb == NULL) return 0x80000000;
+
+ if (signals & (0xFFFFFFFF << osFeature_Signals)) return 0x80000000;
+
+ sig = ptcb->events; // Previous signal flags
+
+ rt_evt_set(signals, ptcb->task_id); // Set event flags
+
+ return sig;
+}
+
+/// Clear the specified Signal Flags of an active thread
+int32_t svcSignalClear (osThreadId thread_id, int32_t signals) {
+ P_TCB ptcb;
+ int32_t sig;
+
+ ptcb = rt_tid2ptcb(thread_id); // Get TCB pointer
+ if (ptcb == NULL) return 0x80000000;
+
+ if (signals & (0xFFFFFFFF << osFeature_Signals)) return 0x80000000;
+
+ sig = ptcb->events; // Previous signal flags
+
+ rt_evt_clr(signals, ptcb->task_id); // Clear event flags
+
+ return sig;
+}
+
+/// Get Signal Flags status of an active thread
+int32_t svcSignalGet (osThreadId thread_id) {
+ P_TCB ptcb;
+
+ ptcb = rt_tid2ptcb(thread_id); // Get TCB pointer
+ if (ptcb == NULL) return 0x80000000;
+
+ return ptcb->events; // Return event flags
+}
+
+/// Wait for one or more Signal Flags to become signaled for the current RUNNING thread
+os_InRegs osEvent_type svcSignalWait (int32_t signals, uint32_t millisec) {
+ OS_RESULT res;
+ osEvent ret;
+
+ if (signals & (0xFFFFFFFF << osFeature_Signals)) {
+ ret.status = osErrorValue;
+ return osEvent_ret_status;
+ }
+
+ if (signals != 0) { // Wait for all specified signals
+ res = rt_evt_wait(signals, rt_ms2tick(millisec), __TRUE);
+ } else { // Wait for any signal
+ res = rt_evt_wait(0xFFFF, rt_ms2tick(millisec), __FALSE);
+ }
+
+ if (res == OS_R_EVT) {
+ ret.status = osEventSignal;
+ ret.value.signals = signals ? signals : os_tsk.run->waits;
+ } else {
+ ret.status = millisec ? osEventTimeout : osOK;
+ ret.value.signals = 0;
+ }
+
+ return osEvent_ret_value;
+}
+
+
+// Signal ISR Calls
+
+/// Set the specified Signal Flags of an active thread
+static __INLINE int32_t isrSignalSet (osThreadId thread_id, int32_t signals) {
+ P_TCB ptcb;
+ int32_t sig;
+
+ ptcb = rt_tid2ptcb(thread_id); // Get TCB pointer
+ if (ptcb == NULL) return 0x80000000;
+
+ if (signals & (0xFFFFFFFF << osFeature_Signals)) return 0x80000000;
+
+ sig = ptcb->events; // Previous signal flags
+
+ isr_evt_set(signals, ptcb->task_id); // Set event flags
+
+ return sig;
+}
+
+
+// Signal Public API
+
+/// Set the specified Signal Flags of an active thread
+int32_t osSignalSet (osThreadId thread_id, int32_t signals) {
+ if (__get_IPSR() != 0) { // in ISR
+ return isrSignalSet(thread_id, signals);
+ } else { // in Thread
+ return __svcSignalSet(thread_id, signals);
+ }
+}
+
+/// Clear the specified Signal Flags of an active thread
+int32_t osSignalClear (osThreadId thread_id, int32_t signals) {
+ if (__get_IPSR() != 0) return osErrorISR; // Not allowed in ISR
+ return __svcSignalClear(thread_id, signals);
+}
+
+/// Get Signal Flags status of an active thread
+int32_t osSignalGet (osThreadId thread_id) {
+ if (__get_IPSR() != 0) return osErrorISR; // Not allowed in ISR
+ return __svcSignalGet(thread_id);
+}
+
+/// Wait for one or more Signal Flags to become signaled for the current RUNNING thread
+os_InRegs osEvent osSignalWait (int32_t signals, uint32_t millisec) {
+ osEvent ret;
+
+ if (__get_IPSR() != 0) { // Not allowed in ISR
+ ret.status = osErrorISR;
+ return ret;
+ }
+ return __svcSignalWait(signals, millisec);
+}
+
+
+// ==== Mutex Management ====
+
+// Mutex Service Calls declarations
+SVC_1_1(svcMutexCreate, osMutexId, osMutexDef_t *, RET_pointer)
+SVC_2_1(svcMutexWait, osStatus, osMutexId, uint32_t, RET_osStatus)
+SVC_1_1(svcMutexRelease, osStatus, osMutexId, RET_osStatus)
+SVC_1_1(svcMutexDelete, osStatus, osMutexId, RET_osStatus)
+
+// Mutex Service Calls
+
+/// Create and Initialize a Mutex object
+osMutexId svcMutexCreate (osMutexDef_t *mutex_def) {
+ OS_ID mut;
+
+ if (mutex_def == NULL) {
+ sysThreadError(osErrorParameter);
+ return NULL;
+ }
+
+ mut = mutex_def->mutex;
+ if (mut == NULL) {
+ sysThreadError(osErrorParameter);
+ return NULL;
+ }
+
+ if (((P_MUCB)mut)->cb_type != 0) {
+ sysThreadError(osErrorParameter);
+ return NULL;
+ }
+
+ rt_mut_init(mut); // Initialize Mutex
+
+ return mut;
+}
+
+/// Wait until a Mutex becomes available
+osStatus svcMutexWait (osMutexId mutex_id, uint32_t millisec) {
+ OS_ID mut;
+ OS_RESULT res;
+
+ mut = rt_id2obj(mutex_id);
+ if (mut == NULL) return osErrorParameter;
+
+ if (((P_MUCB)mut)->cb_type != MUCB) return osErrorParameter;
+
+ res = rt_mut_wait(mut, rt_ms2tick(millisec)); // Wait for Mutex
+
+ if (res == OS_R_TMO) {
+ return (millisec ? osErrorTimeoutResource : osErrorResource);
+ }
+
+ return osOK;
+}
+
+/// Release a Mutex that was obtained with osMutexWait
+osStatus svcMutexRelease (osMutexId mutex_id) {
+ OS_ID mut;
+ OS_RESULT res;
+
+ mut = rt_id2obj(mutex_id);
+ if (mut == NULL) return osErrorParameter;
+
+ if (((P_MUCB)mut)->cb_type != MUCB) return osErrorParameter;
+
+ res = rt_mut_release(mut); // Release Mutex
+
+ if (res == OS_R_NOK) return osErrorResource; // Thread not owner or Zero Counter
+
+ return osOK;
+}
+
+/// Delete a Mutex that was created by osMutexCreate
+osStatus svcMutexDelete (osMutexId mutex_id) {
+ OS_ID mut;
+
+ mut = rt_id2obj(mutex_id);
+ if (mut == NULL) return osErrorParameter;
+
+ if (((P_MUCB)mut)->cb_type != MUCB) return osErrorParameter;
+
+ rt_mut_delete(mut); // Release Mutex
+
+ return osOK;
+}
+
+
+// Mutex Public API
+
+/// Create and Initialize a Mutex object
+osMutexId osMutexCreate (osMutexDef_t *mutex_def) {
+ if (__get_IPSR() != 0) return NULL; // Not allowed in ISR
+ if (((__get_CONTROL() & 1) == 0) && (os_running == 0)) {
+ // Privileged and not running
+ return svcMutexCreate(mutex_def);
+ } else {
+ return __svcMutexCreate(mutex_def);
+ }
+}
+
+/// Wait until a Mutex becomes available
+osStatus osMutexWait (osMutexId mutex_id, uint32_t millisec) {
+ if (__get_IPSR() != 0) return osErrorISR; // Not allowed in ISR
+ return __svcMutexWait(mutex_id, millisec);
+}
+
+/// Release a Mutex that was obtained with osMutexWait
+osStatus osMutexRelease (osMutexId mutex_id) {
+ if (__get_IPSR() != 0) return osErrorISR; // Not allowed in ISR
+ return __svcMutexRelease(mutex_id);
+}
+
+/// Delete a Mutex that was created by osMutexCreate
+osStatus osMutexDelete (osMutexId mutex_id) {
+ if (__get_IPSR() != 0) return osErrorISR; // Not allowed in ISR
+ return __svcMutexDelete(mutex_id);
+}
+
+
+// ==== Semaphore Management ====
+
+// Semaphore Service Calls declarations
+SVC_2_1(svcSemaphoreCreate, osSemaphoreId, const osSemaphoreDef_t *, int32_t, RET_pointer)
+SVC_2_1(svcSemaphoreWait, int32_t, osSemaphoreId, uint32_t, RET_int32_t)
+SVC_1_1(svcSemaphoreRelease, osStatus, osSemaphoreId, RET_osStatus)
+SVC_1_1(svcSemaphoreDelete, osStatus, osSemaphoreId, RET_osStatus)
+
+// Semaphore Service Calls
+
+/// Create and Initialize a Semaphore object
+osSemaphoreId svcSemaphoreCreate (const osSemaphoreDef_t *semaphore_def, int32_t count) {
+ OS_ID sem;
+
+ if (semaphore_def == NULL) {
+ sysThreadError(osErrorParameter);
+ return NULL;
+ }
+
+ sem = semaphore_def->semaphore;
+ if (sem == NULL) {
+ sysThreadError(osErrorParameter);
+ return NULL;
+ }
+
+ if (((P_SCB)sem)->cb_type != 0) {
+ sysThreadError(osErrorParameter);
+ return NULL;
+ }
+
+ if (count > osFeature_Semaphore) {
+ sysThreadError(osErrorValue);
+ return NULL;
+ }
+
+ rt_sem_init(sem, count); // Initialize Semaphore
+
+ return sem;
+}
+
+/// Wait until a Semaphore becomes available
+int32_t svcSemaphoreWait (osSemaphoreId semaphore_id, uint32_t millisec) {
+ OS_ID sem;
+ OS_RESULT res;
+
+ sem = rt_id2obj(semaphore_id);
+ if (sem == NULL) return -1;
+
+ if (((P_SCB)sem)->cb_type != SCB) return -1;
+
+ res = rt_sem_wait(sem, rt_ms2tick(millisec)); // Wait for Semaphore
+
+ if (res == OS_R_TMO) return 0; // Timeout
+
+ return (((P_SCB)sem)->tokens + 1);
+}
+
+/// Release a Semaphore
+osStatus svcSemaphoreRelease (osSemaphoreId semaphore_id) {
+ OS_ID sem;
+
+ sem = rt_id2obj(semaphore_id);
+ if (sem == NULL) return osErrorParameter;
+
+ if (((P_SCB)sem)->cb_type != SCB) return osErrorParameter;
+
+ if (((P_SCB)sem)->tokens == osFeature_Semaphore) return osErrorResource;
+
+ rt_sem_send(sem); // Release Semaphore
+
+ return osOK;
+}
+
+/// Delete a Semaphore that was created by osSemaphoreCreate
+osStatus svcSemaphoreDelete (osSemaphoreId semaphore_id) {
+ OS_ID sem;
+
+ sem = rt_id2obj(semaphore_id);
+ if (sem == NULL) return osErrorParameter;
+
+ if (((P_SCB)sem)->cb_type != SCB) return osErrorParameter;
+
+ rt_sem_delete(sem); // Delete Semaphore
+
+ return osOK;
+}
+
+
+// Semaphore ISR Calls
+
+/// Release a Semaphore
+static __INLINE osStatus isrSemaphoreRelease (osSemaphoreId semaphore_id) {
+ OS_ID sem;
+
+ sem = rt_id2obj(semaphore_id);
+ if (sem == NULL) return osErrorParameter;
+
+ if (((P_SCB)sem)->cb_type != SCB) return osErrorParameter;
+
+ if (((P_SCB)sem)->tokens == osFeature_Semaphore) return osErrorResource;
+
+ isr_sem_send(sem); // Release Semaphore
+
+ return osOK;
+}
+
+
+// Semaphore Public API
+
+/// Create and Initialize a Semaphore object
+osSemaphoreId osSemaphoreCreate (osSemaphoreDef_t *semaphore_def, int32_t count) {
+ if (__get_IPSR() != 0) return NULL; // Not allowed in ISR
+ if (((__get_CONTROL() & 1) == 0) && (os_running == 0)) {
+ // Privileged and not running
+ return svcSemaphoreCreate(semaphore_def, count);
+ } else {
+ return __svcSemaphoreCreate(semaphore_def, count);
+ }
+}
+
+/// Wait until a Semaphore becomes available
+int32_t osSemaphoreWait (osSemaphoreId semaphore_id, uint32_t millisec) {
+ if (__get_IPSR() != 0) return -1; // Not allowed in ISR
+ return __svcSemaphoreWait(semaphore_id, millisec);
+}
+
+/// Release a Semaphore
+osStatus osSemaphoreRelease (osSemaphoreId semaphore_id) {
+ if (__get_IPSR() != 0) { // in ISR
+ return isrSemaphoreRelease(semaphore_id);
+ } else { // in Thread
+ return __svcSemaphoreRelease(semaphore_id);
+ }
+}
+
+/// Delete a Semaphore that was created by osSemaphoreCreate
+osStatus osSemaphoreDelete (osSemaphoreId semaphore_id) {
+ if (__get_IPSR() != 0) return osErrorISR; // Not allowed in ISR
+ return __svcSemaphoreDelete(semaphore_id);
+}
+
+
+// ==== Memory Management Functions ====
+
+// Memory Management Helper Functions
+
+// Clear Memory Box (Zero init)
+static void rt_clr_box (void *box_mem, void *box) {
+ uint32_t *p, n;
+
+ if (box) {
+ p = box;
+ for (n = ((P_BM)box_mem)->blk_size; n; n -= 4) {
+ *p++ = 0;
+ }
+ }
+}
+
+// Memory Management Service Calls declarations
+SVC_1_1(svcPoolCreate, osPoolId, const osPoolDef_t *, RET_pointer)
+SVC_2_1(sysPoolAlloc, void *, osPoolId, uint32_t, RET_pointer)
+SVC_2_1(sysPoolFree, osStatus, osPoolId, void *, RET_osStatus)
+
+// Memory Management Service & ISR Calls
+
+/// Create and Initialize memory pool
+osPoolId svcPoolCreate (const osPoolDef_t *pool_def) {
+ uint32_t blk_sz;
+
+ if ((pool_def == NULL) ||
+ (pool_def->pool_sz == 0) ||
+ (pool_def->item_sz == 0) ||
+ (pool_def->pool == NULL)) {
+ sysThreadError(osErrorParameter);
+ return NULL;
+ }
+
+ blk_sz = (pool_def->item_sz + 3) & ~3;
+
+ _init_box(pool_def->pool, sizeof(struct OS_BM) + pool_def->pool_sz * blk_sz, blk_sz);
+
+ return pool_def->pool;
+}
+
+/// Allocate a memory block from a memory pool
+void *sysPoolAlloc (osPoolId pool_id, uint32_t clr) {
+ void *ptr;
+
+ if (pool_id == NULL) return NULL;
+
+ ptr = rt_alloc_box(pool_id);
+ if (clr) {
+ rt_clr_box(pool_id, ptr);
+ }
+
+ return ptr;
+}
+
+/// Return an allocated memory block back to a specific memory pool
+osStatus sysPoolFree (osPoolId pool_id, void *block) {
+ int32_t res;
+
+ if (pool_id == NULL) return osErrorParameter;
+
+ res = rt_free_box(pool_id, block);
+ if (res != 0) return osErrorValue;
+
+ return osOK;
+}
+
+
+// Memory Management Public API
+
+/// Create and Initialize memory pool
+osPoolId osPoolCreate (osPoolDef_t *pool_def) {
+ if (__get_IPSR() != 0) return NULL; // Not allowed in ISR
+ if (((__get_CONTROL() & 1) == 0) && (os_running == 0)) {
+ // Privileged and not running
+ return svcPoolCreate(pool_def);
+ } else {
+ return __svcPoolCreate(pool_def);
+ }
+}
+
+/// Allocate a memory block from a memory pool
+void *osPoolAlloc (osPoolId pool_id) {
+ if ((__get_IPSR() != 0) || ((__get_CONTROL() & 1) == 0)) { // in ISR or Privileged
+ return sysPoolAlloc(pool_id, 0);
+ } else { // in Thread
+ return __sysPoolAlloc(pool_id, 0);
+ }
+}
+
+/// Allocate a memory block from a memory pool and set memory block to zero
+void *osPoolCAlloc (osPoolId pool_id) {
+ if ((__get_IPSR() != 0) || ((__get_CONTROL() & 1) == 0)) { // in ISR or Privileged
+ return sysPoolAlloc(pool_id, 1);
+ } else { // in Thread
+ return __sysPoolAlloc(pool_id, 1);
+ }
+}
+
+/// Return an allocated memory block back to a specific memory pool
+osStatus osPoolFree (osPoolId pool_id, void *block) {
+ if ((__get_IPSR() != 0) || ((__get_CONTROL() & 1) == 0)) { // in ISR or Privileged
+ return sysPoolFree(pool_id, block);
+ } else { // in Thread
+ return __sysPoolFree(pool_id, block);
+ }
+}
+
+
+// ==== Message Queue Management Functions ====
+
+// Message Queue Management Service Calls declarations
+SVC_2_1(svcMessageCreate, osMessageQId, osMessageQDef_t *, osThreadId, RET_pointer)
+SVC_3_1(svcMessagePut, osStatus, osMessageQId, uint32_t, uint32_t, RET_osStatus)
+SVC_2_3(svcMessageGet, os_InRegs osEvent, osMessageQId, uint32_t, RET_osEvent)
+
+// Message Queue Service Calls
+
+/// Create and Initialize Message Queue
+osMessageQId svcMessageCreate (osMessageQDef_t *queue_def, osThreadId thread_id) {
+
+ if ((queue_def == NULL) ||
+ (queue_def->queue_sz == 0) ||
+ (queue_def->pool == NULL)) {
+ sysThreadError(osErrorParameter);
+ return NULL;
+ }
+
+ if (((P_MCB)queue_def->pool)->cb_type != 0) {
+ sysThreadError(osErrorParameter);
+ return NULL;
+ }
+
+ rt_mbx_init(queue_def->pool, 4*(queue_def->queue_sz + 4));
+
+ return queue_def->pool;
+}
+
+/// Put a Message to a Queue
+osStatus svcMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec) {
+ OS_RESULT res;
+
+ if (queue_id == NULL) return osErrorParameter;
+
+ if (((P_MCB)queue_id)->cb_type != MCB) return osErrorParameter;
+
+ res = rt_mbx_send(queue_id, (void *)info, rt_ms2tick(millisec));
+
+ if (res == OS_R_TMO) {
+ return (millisec ? osErrorTimeoutResource : osErrorResource);
+ }
+
+ return osOK;
+}
+
+/// Get a Message or Wait for a Message from a Queue
+os_InRegs osEvent_type svcMessageGet (osMessageQId queue_id, uint32_t millisec) {
+ OS_RESULT res;
+ osEvent ret;
+
+ if (queue_id == NULL) {
+ ret.status = osErrorParameter;
+ return osEvent_ret_status;
+ }
+
+ if (((P_MCB)queue_id)->cb_type != MCB) {
+ ret.status = osErrorParameter;
+ return osEvent_ret_status;
+ }
+
+ res = rt_mbx_wait(queue_id, &ret.value.p, rt_ms2tick(millisec));
+
+ if (res == OS_R_TMO) {
+ ret.status = millisec ? osEventTimeout : osOK;
+ return osEvent_ret_value;
+ }
+
+ ret.status = osEventMessage;
+
+ return osEvent_ret_value;
+}
+
+
+// Message Queue ISR Calls
+
+/// Put a Message to a Queue
+static __INLINE osStatus isrMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec) {
+
+ if ((queue_id == NULL) || (millisec != 0)) {
+ return osErrorParameter;
+ }
+
+ if (((P_MCB)queue_id)->cb_type != MCB) return osErrorParameter;
+
+ if (rt_mbx_check(queue_id) == 0) { // Check if Queue is full
+ return osErrorResource;
+ }
+
+ isr_mbx_send(queue_id, (void *)info);
+
+ return osOK;
+}
+
+/// Get a Message or Wait for a Message from a Queue
+static __INLINE os_InRegs osEvent isrMessageGet (osMessageQId queue_id, uint32_t millisec) {
+ OS_RESULT res;
+ osEvent ret;
+
+ if ((queue_id == NULL) || (millisec != 0)) {
+ ret.status = osErrorParameter;
+ return ret;
+ }
+
+ if (((P_MCB)queue_id)->cb_type != MCB) {
+ ret.status = osErrorParameter;
+ return ret;
+ }
+
+ res = isr_mbx_receive(queue_id, &ret.value.p);
+
+ if (res != OS_R_MBX) {
+ ret.status = osOK;
+ return ret;
+ }
+
+ ret.status = osEventMessage;
+
+ return ret;
+}
+
+
+// Message Queue Management Public API
+
+/// Create and Initialize Message Queue
+osMessageQId osMessageCreate (osMessageQDef_t *queue_def, osThreadId thread_id) {
+ if (__get_IPSR() != 0) return NULL; // Not allowed in ISR
+ if (((__get_CONTROL() & 1) == 0) && (os_running == 0)) {
+ // Privileged and not running
+ return svcMessageCreate(queue_def, thread_id);
+ } else {
+ return __svcMessageCreate(queue_def, thread_id);
+ }
+}
+
+/// Put a Message to a Queue
+osStatus osMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec) {
+ if (__get_IPSR() != 0) { // in ISR
+ return isrMessagePut(queue_id, info, millisec);
+ } else { // in Thread
+ return __svcMessagePut(queue_id, info, millisec);
+ }
+}
+
+/// Get a Message or Wait for a Message from a Queue
+os_InRegs osEvent osMessageGet (osMessageQId queue_id, uint32_t millisec) {
+ if (__get_IPSR() != 0) { // in ISR
+ return isrMessageGet(queue_id, millisec);
+ } else { // in Thread
+ return __svcMessageGet(queue_id, millisec);
+ }
+}
+
+
+// ==== Mail Queue Management Functions ====
+
+// Mail Queue Management Service Calls declarations
+SVC_2_1(svcMailCreate, osMailQId, osMailQDef_t *, osThreadId, RET_pointer)
+SVC_4_1(sysMailAlloc, void *, osMailQId, uint32_t, uint32_t, uint32_t, RET_pointer)
+SVC_3_1(sysMailFree, osStatus, osMailQId, void *, uint32_t, RET_osStatus)
+
+// Mail Queue Management Service & ISR Calls
+
+/// Create and Initialize mail queue
+osMailQId svcMailCreate (osMailQDef_t *queue_def, osThreadId thread_id) {
+ uint32_t blk_sz;
+ P_MCB pmcb;
+ void *pool;
+
+ if ((queue_def == NULL) ||
+ (queue_def->queue_sz == 0) ||
+ (queue_def->item_sz == 0) ||
+ (queue_def->pool == NULL)) {
+ sysThreadError(osErrorParameter);
+ return NULL;
+ }
+
+ pmcb = *(((void **)queue_def->pool) + 0);
+ pool = *(((void **)queue_def->pool) + 1);
+
+ if ((pool == NULL) || (pmcb == NULL) || (pmcb->cb_type != 0)) {
+ sysThreadError(osErrorParameter);
+ return NULL;
+ }
+
+ blk_sz = (queue_def->item_sz + 3) & ~3;
+
+ _init_box(pool, sizeof(struct OS_BM) + queue_def->queue_sz * blk_sz, blk_sz);
+
+ rt_mbx_init(pmcb, 4*(queue_def->queue_sz + 4));
+
+
+ return queue_def->pool;
+}
+
+/// Allocate a memory block from a mail
+void *sysMailAlloc (osMailQId queue_id, uint32_t millisec, uint32_t isr, uint32_t clr) {
+ P_MCB pmcb;
+ void *pool;
+ void *mem;
+
+ if (queue_id == NULL) return NULL;
+
+ pmcb = *(((void **)queue_id) + 0);
+ pool = *(((void **)queue_id) + 1);
+
+ if ((pool == NULL) || (pmcb == NULL)) return NULL;
+
+ if (isr && (millisec != 0)) return NULL;
+
+ mem = rt_alloc_box(pool);
+ if (clr) {
+ rt_clr_box(pool, mem);
+ }
+
+ if ((mem == NULL) && (millisec != 0)) {
+ // Put Task to sleep when Memory not available
+ if (pmcb->p_lnk != NULL) {
+ rt_put_prio((P_XCB)pmcb, os_tsk.run);
+ } else {
+ pmcb->p_lnk = os_tsk.run;
+ os_tsk.run->p_lnk = NULL;
+ os_tsk.run->p_rlnk = (P_TCB)pmcb;
+ // Task is waiting to allocate a message
+ pmcb->state = 3;
+ }
+ rt_block(rt_ms2tick(millisec), WAIT_MBX);
+ }
+
+ return mem;
+}
+
+/// Free a memory block from a mail
+osStatus sysMailFree (osMailQId queue_id, void *mail, uint32_t isr) {
+ P_MCB pmcb;
+ P_TCB ptcb;
+ void *pool;
+ void *mem;
+ int32_t res;
+
+ if (queue_id == NULL) return osErrorParameter;
+
+ pmcb = *(((void **)queue_id) + 0);
+ pool = *(((void **)queue_id) + 1);
+
+ if ((pmcb == NULL) || (pool == NULL)) return osErrorParameter;
+
+ res = rt_free_box(pool, mail);
+
+ if (res != 0) return osErrorValue;
+
+ if (pmcb->state == 3) {
+ // Task is waiting to allocate a message
+ if (isr) {
+ rt_psq_enq (pmcb, (U32)pool);
+ rt_psh_req ();
+ } else {
+ mem = rt_alloc_box(pool);
+ if (mem != NULL) {
+ ptcb = rt_get_first((P_XCB)pmcb);
+ if (pmcb->p_lnk == NULL) {
+ pmcb->state = 0;
+ }
+ rt_ret_val(ptcb, (U32)mem);
+ rt_rmv_dly(ptcb);
+ rt_dispatch(ptcb);
+ }
+ }
+ }
+
+ return osOK;
+}
+
+
+// Mail Queue Management Public API
+
+/// Create and Initialize mail queue
+osMailQId osMailCreate (osMailQDef_t *queue_def, osThreadId thread_id) {
+ if (__get_IPSR() != 0) return NULL; // Not allowed in ISR
+ if (((__get_CONTROL() & 1) == 0) && (os_running == 0)) {
+ // Privileged and not running
+ return svcMailCreate(queue_def, thread_id);
+ } else {
+ return __svcMailCreate(queue_def, thread_id);
+ }
+}
+
+/// Allocate a memory block from a mail
+void *osMailAlloc (osMailQId queue_id, uint32_t millisec) {
+ if (__get_IPSR() != 0) { // in ISR
+ return sysMailAlloc(queue_id, millisec, 1, 0);
+ } else { // in Thread
+ return __sysMailAlloc(queue_id, millisec, 0, 0);
+ }
+}
+
+/// Allocate a memory block from a mail and set memory block to zero
+void *osMailCAlloc (osMailQId queue_id, uint32_t millisec) {
+ if (__get_IPSR() != 0) { // in ISR
+ return sysMailAlloc(queue_id, millisec, 1, 1);
+ } else { // in Thread
+ return __sysMailAlloc(queue_id, millisec, 0, 1);
+ }
+}
+
+/// Free a memory block from a mail
+osStatus osMailFree (osMailQId queue_id, void *mail) {
+ if (__get_IPSR() != 0) { // in ISR
+ return sysMailFree(queue_id, mail, 1);
+ } else { // in Thread
+ return __sysMailFree(queue_id, mail, 0);
+ }
+}
+
+/// Put a mail to a queue
+osStatus osMailPut (osMailQId queue_id, void *mail) {
+ if (queue_id == NULL) return osErrorParameter;
+ if (mail == NULL) return osErrorValue;
+ return osMessagePut(*((void **)queue_id), (uint32_t)mail, 0);
+}
+
+/// Get a mail from a queue
+os_InRegs osEvent osMailGet (osMailQId queue_id, uint32_t millisec) {
+ osEvent ret;
+
+ if (queue_id == NULL) {
+ ret.status = osErrorParameter;
+ return ret;
+ }
+
+ ret = osMessageGet(*((void **)queue_id), millisec);
+ if (ret.status == osEventMessage) ret.status = osEventMail;
+
+ return ret;
+}