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Dependencies:   F7_Ethernet WebSocketClient mbed mcp3008

Fork of Nucleo_F746ZG_Ethernet by Dieter Graef

F7_Ethernet/lwip/include/lwip/sys.h@0:f9b6112278fe, 2016-06-18 (annotated)

Committer:
DieterGraef
Date:
Sat Jun 18 10:49:12 2016 +0000
Revision:
0:f9b6112278fe
Ethernet for the NUCLEO STM32F746 Board Testprogram uses DHCP and NTP to set the clock

Who changed what in which revision?

UserRevisionLine numberNew contents of line
DieterGraef 0:f9b6112278fe 1 /*
DieterGraef 0:f9b6112278fe 2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
DieterGraef 0:f9b6112278fe 3 * All rights reserved.
DieterGraef 0:f9b6112278fe 4 *
DieterGraef 0:f9b6112278fe 5 * Redistribution and use in source and binary forms, with or without modification,
DieterGraef 0:f9b6112278fe 6 * are permitted provided that the following conditions are met:
DieterGraef 0:f9b6112278fe 7 *
DieterGraef 0:f9b6112278fe 8 * 1. Redistributions of source code must retain the above copyright notice,
DieterGraef 0:f9b6112278fe 9 * this list of conditions and the following disclaimer.
DieterGraef 0:f9b6112278fe 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
DieterGraef 0:f9b6112278fe 11 * this list of conditions and the following disclaimer in the documentation
DieterGraef 0:f9b6112278fe 12 * and/or other materials provided with the distribution.
DieterGraef 0:f9b6112278fe 13 * 3. The name of the author may not be used to endorse or promote products
DieterGraef 0:f9b6112278fe 14 * derived from this software without specific prior written permission.
DieterGraef 0:f9b6112278fe 15 *
DieterGraef 0:f9b6112278fe 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
DieterGraef 0:f9b6112278fe 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
DieterGraef 0:f9b6112278fe 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
DieterGraef 0:f9b6112278fe 19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
DieterGraef 0:f9b6112278fe 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
DieterGraef 0:f9b6112278fe 21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
DieterGraef 0:f9b6112278fe 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
DieterGraef 0:f9b6112278fe 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
DieterGraef 0:f9b6112278fe 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
DieterGraef 0:f9b6112278fe 25 * OF SUCH DAMAGE.
DieterGraef 0:f9b6112278fe 26 *
DieterGraef 0:f9b6112278fe 27 * This file is part of the lwIP TCP/IP stack.
DieterGraef 0:f9b6112278fe 28 *
DieterGraef 0:f9b6112278fe 29 * Author: Adam Dunkels <adam@sics.se>
DieterGraef 0:f9b6112278fe 30 *
DieterGraef 0:f9b6112278fe 31 */
DieterGraef 0:f9b6112278fe 32 #ifndef __LWIP_SYS_H__
DieterGraef 0:f9b6112278fe 33 #define __LWIP_SYS_H__
DieterGraef 0:f9b6112278fe 34
DieterGraef 0:f9b6112278fe 35 #include "lwip/opt.h"
DieterGraef 0:f9b6112278fe 36
DieterGraef 0:f9b6112278fe 37 #ifdef __cplusplus
DieterGraef 0:f9b6112278fe 38 extern "C" {
DieterGraef 0:f9b6112278fe 39 #endif
DieterGraef 0:f9b6112278fe 40
DieterGraef 0:f9b6112278fe 41 #if NO_SYS
DieterGraef 0:f9b6112278fe 42
DieterGraef 0:f9b6112278fe 43 /* For a totally minimal and standalone system, we provide null
DieterGraef 0:f9b6112278fe 44 definitions of the sys_ functions. */
DieterGraef 0:f9b6112278fe 45 typedef u8_t sys_sem_t;
DieterGraef 0:f9b6112278fe 46 typedef u8_t sys_mutex_t;
DieterGraef 0:f9b6112278fe 47 typedef u8_t sys_mbox_t;
DieterGraef 0:f9b6112278fe 48
DieterGraef 0:f9b6112278fe 49 #define sys_sem_new(s, c) ERR_OK
DieterGraef 0:f9b6112278fe 50 #define sys_sem_signal(s)
DieterGraef 0:f9b6112278fe 51 #define sys_sem_wait(s)
DieterGraef 0:f9b6112278fe 52 #define sys_arch_sem_wait(s,t)
DieterGraef 0:f9b6112278fe 53 #define sys_sem_free(s)
DieterGraef 0:f9b6112278fe 54 #define sys_sem_valid(s) 0
DieterGraef 0:f9b6112278fe 55 #define sys_sem_set_invalid(s)
DieterGraef 0:f9b6112278fe 56 #define sys_mutex_new(mu) ERR_OK
DieterGraef 0:f9b6112278fe 57 #define sys_mutex_lock(mu)
DieterGraef 0:f9b6112278fe 58 #define sys_mutex_unlock(mu)
DieterGraef 0:f9b6112278fe 59 #define sys_mutex_free(mu)
DieterGraef 0:f9b6112278fe 60 #define sys_mutex_valid(mu) 0
DieterGraef 0:f9b6112278fe 61 #define sys_mutex_set_invalid(mu)
DieterGraef 0:f9b6112278fe 62 #define sys_mbox_new(m, s) ERR_OK
DieterGraef 0:f9b6112278fe 63 #define sys_mbox_fetch(m,d)
DieterGraef 0:f9b6112278fe 64 #define sys_mbox_tryfetch(m,d)
DieterGraef 0:f9b6112278fe 65 #define sys_mbox_post(m,d)
DieterGraef 0:f9b6112278fe 66 #define sys_mbox_trypost(m,d)
DieterGraef 0:f9b6112278fe 67 #define sys_mbox_free(m)
DieterGraef 0:f9b6112278fe 68 #define sys_mbox_valid(m)
DieterGraef 0:f9b6112278fe 69 #define sys_mbox_set_invalid(m)
DieterGraef 0:f9b6112278fe 70
DieterGraef 0:f9b6112278fe 71 #define sys_thread_new(n,t,a,s,p)
DieterGraef 0:f9b6112278fe 72
DieterGraef 0:f9b6112278fe 73 #define sys_msleep(t)
DieterGraef 0:f9b6112278fe 74
DieterGraef 0:f9b6112278fe 75 #else /* NO_SYS */
DieterGraef 0:f9b6112278fe 76
DieterGraef 0:f9b6112278fe 77 /** Return code for timeouts from sys_arch_mbox_fetch and sys_arch_sem_wait */
DieterGraef 0:f9b6112278fe 78 #define SYS_ARCH_TIMEOUT 0xffffffffUL
DieterGraef 0:f9b6112278fe 79
DieterGraef 0:f9b6112278fe 80 /** sys_mbox_tryfetch() returns SYS_MBOX_EMPTY if appropriate.
DieterGraef 0:f9b6112278fe 81 * For now we use the same magic value, but we allow this to change in future.
DieterGraef 0:f9b6112278fe 82 */
DieterGraef 0:f9b6112278fe 83 #define SYS_MBOX_EMPTY SYS_ARCH_TIMEOUT
DieterGraef 0:f9b6112278fe 84
DieterGraef 0:f9b6112278fe 85 #include "lwip/err.h"
DieterGraef 0:f9b6112278fe 86 #include "arch/sys_arch.h"
DieterGraef 0:f9b6112278fe 87
DieterGraef 0:f9b6112278fe 88 /** Function prototype for thread functions */
DieterGraef 0:f9b6112278fe 89 typedef void (*lwip_thread_fn)(void *arg);
DieterGraef 0:f9b6112278fe 90
DieterGraef 0:f9b6112278fe 91 /* Function prototypes for functions to be implemented by platform ports
DieterGraef 0:f9b6112278fe 92 (in sys_arch.c) */
DieterGraef 0:f9b6112278fe 93
DieterGraef 0:f9b6112278fe 94 /* Mutex functions: */
DieterGraef 0:f9b6112278fe 95
DieterGraef 0:f9b6112278fe 96 /** Define LWIP_COMPAT_MUTEX if the port has no mutexes and binary semaphores
DieterGraef 0:f9b6112278fe 97 should be used instead */
DieterGraef 0:f9b6112278fe 98 #if LWIP_COMPAT_MUTEX
DieterGraef 0:f9b6112278fe 99 /* for old ports that don't have mutexes: define them to binary semaphores */
DieterGraef 0:f9b6112278fe 100 #define sys_mutex_t sys_sem_t
DieterGraef 0:f9b6112278fe 101 #define sys_mutex_new(mutex) sys_sem_new(mutex, 1)
DieterGraef 0:f9b6112278fe 102 #define sys_mutex_lock(mutex) sys_sem_wait(mutex)
DieterGraef 0:f9b6112278fe 103 #define sys_mutex_unlock(mutex) sys_sem_signal(mutex)
DieterGraef 0:f9b6112278fe 104 #define sys_mutex_free(mutex) sys_sem_free(mutex)
DieterGraef 0:f9b6112278fe 105 #define sys_mutex_valid(mutex) sys_sem_valid(mutex)
DieterGraef 0:f9b6112278fe 106 #define sys_mutex_set_invalid(mutex) sys_sem_set_invalid(mutex)
DieterGraef 0:f9b6112278fe 107
DieterGraef 0:f9b6112278fe 108 #else /* LWIP_COMPAT_MUTEX */
DieterGraef 0:f9b6112278fe 109
DieterGraef 0:f9b6112278fe 110 /** Create a new mutex
DieterGraef 0:f9b6112278fe 111 * @param mutex pointer to the mutex to create
DieterGraef 0:f9b6112278fe 112 * @return a new mutex */
DieterGraef 0:f9b6112278fe 113 err_t sys_mutex_new(sys_mutex_t *mutex);
DieterGraef 0:f9b6112278fe 114 /** Lock a mutex
DieterGraef 0:f9b6112278fe 115 * @param mutex the mutex to lock */
DieterGraef 0:f9b6112278fe 116 void sys_mutex_lock(sys_mutex_t *mutex);
DieterGraef 0:f9b6112278fe 117 /** Unlock a mutex
DieterGraef 0:f9b6112278fe 118 * @param mutex the mutex to unlock */
DieterGraef 0:f9b6112278fe 119 void sys_mutex_unlock(sys_mutex_t *mutex);
DieterGraef 0:f9b6112278fe 120 /** Delete a semaphore
DieterGraef 0:f9b6112278fe 121 * @param mutex the mutex to delete */
DieterGraef 0:f9b6112278fe 122 void sys_mutex_free(sys_mutex_t *mutex);
DieterGraef 0:f9b6112278fe 123 #ifndef sys_mutex_valid
DieterGraef 0:f9b6112278fe 124 /** Check if a mutex is valid/allocated: return 1 for valid, 0 for invalid */
DieterGraef 0:f9b6112278fe 125 int sys_mutex_valid(sys_mutex_t *mutex);
DieterGraef 0:f9b6112278fe 126 #endif
DieterGraef 0:f9b6112278fe 127 #ifndef sys_mutex_set_invalid
DieterGraef 0:f9b6112278fe 128 /** Set a mutex invalid so that sys_mutex_valid returns 0 */
DieterGraef 0:f9b6112278fe 129 void sys_mutex_set_invalid(sys_mutex_t *mutex);
DieterGraef 0:f9b6112278fe 130 #endif
DieterGraef 0:f9b6112278fe 131 #endif /* LWIP_COMPAT_MUTEX */
DieterGraef 0:f9b6112278fe 132
DieterGraef 0:f9b6112278fe 133 /* Semaphore functions: */
DieterGraef 0:f9b6112278fe 134
DieterGraef 0:f9b6112278fe 135 /** Create a new semaphore
DieterGraef 0:f9b6112278fe 136 * @param sem pointer to the semaphore to create
DieterGraef 0:f9b6112278fe 137 * @param count initial count of the semaphore
DieterGraef 0:f9b6112278fe 138 * @return ERR_OK if successful, another err_t otherwise */
DieterGraef 0:f9b6112278fe 139 err_t sys_sem_new(sys_sem_t *sem, u8_t count);
DieterGraef 0:f9b6112278fe 140 /** Signals a semaphore
DieterGraef 0:f9b6112278fe 141 * @param sem the semaphore to signal */
DieterGraef 0:f9b6112278fe 142 void sys_sem_signal(sys_sem_t *sem);
DieterGraef 0:f9b6112278fe 143 /** Wait for a semaphore for the specified timeout
DieterGraef 0:f9b6112278fe 144 * @param sem the semaphore to wait for
DieterGraef 0:f9b6112278fe 145 * @param timeout timeout in milliseconds to wait (0 = wait forever)
DieterGraef 0:f9b6112278fe 146 * @return time (in milliseconds) waited for the semaphore
DieterGraef 0:f9b6112278fe 147 * or SYS_ARCH_TIMEOUT on timeout */
DieterGraef 0:f9b6112278fe 148 u32_t sys_arch_sem_wait(sys_sem_t *sem, u32_t timeout);
DieterGraef 0:f9b6112278fe 149 /** Delete a semaphore
DieterGraef 0:f9b6112278fe 150 * @param sem semaphore to delete */
DieterGraef 0:f9b6112278fe 151 void sys_sem_free(sys_sem_t *sem);
DieterGraef 0:f9b6112278fe 152 /** Wait for a semaphore - forever/no timeout */
DieterGraef 0:f9b6112278fe 153 #define sys_sem_wait(sem) sys_arch_sem_wait(sem, 0)
DieterGraef 0:f9b6112278fe 154 #ifndef sys_sem_valid
DieterGraef 0:f9b6112278fe 155 /** Check if a sempahore is valid/allocated: return 1 for valid, 0 for invalid */
DieterGraef 0:f9b6112278fe 156 int sys_sem_valid(sys_sem_t *sem);
DieterGraef 0:f9b6112278fe 157 #endif
DieterGraef 0:f9b6112278fe 158 #ifndef sys_sem_set_invalid
DieterGraef 0:f9b6112278fe 159 /** Set a semaphore invalid so that sys_sem_valid returns 0 */
DieterGraef 0:f9b6112278fe 160 void sys_sem_set_invalid(sys_sem_t *sem);
DieterGraef 0:f9b6112278fe 161 #endif
DieterGraef 0:f9b6112278fe 162
DieterGraef 0:f9b6112278fe 163 /* Time functions. */
DieterGraef 0:f9b6112278fe 164 #ifndef sys_msleep
DieterGraef 0:f9b6112278fe 165 void sys_msleep(u32_t ms); /* only has a (close to) 1 jiffy resolution. */
DieterGraef 0:f9b6112278fe 166 #endif
DieterGraef 0:f9b6112278fe 167
DieterGraef 0:f9b6112278fe 168 /* Mailbox functions. */
DieterGraef 0:f9b6112278fe 169
DieterGraef 0:f9b6112278fe 170 /** Create a new mbox of specified size
DieterGraef 0:f9b6112278fe 171 * @param mbox pointer to the mbox to create
DieterGraef 0:f9b6112278fe 172 * @param size (miminum) number of messages in this mbox
DieterGraef 0:f9b6112278fe 173 * @return ERR_OK if successful, another err_t otherwise */
DieterGraef 0:f9b6112278fe 174 err_t sys_mbox_new(sys_mbox_t *mbox, int size);
DieterGraef 0:f9b6112278fe 175 /** Post a message to an mbox - may not fail
DieterGraef 0:f9b6112278fe 176 * -> blocks if full, only used from tasks not from ISR
DieterGraef 0:f9b6112278fe 177 * @param mbox mbox to posts the message
DieterGraef 0:f9b6112278fe 178 * @param msg message to post (ATTENTION: can be NULL) */
DieterGraef 0:f9b6112278fe 179 void sys_mbox_post(sys_mbox_t *mbox, void *msg);
DieterGraef 0:f9b6112278fe 180 /** Try to post a message to an mbox - may fail if full or ISR
DieterGraef 0:f9b6112278fe 181 * @param mbox mbox to posts the message
DieterGraef 0:f9b6112278fe 182 * @param msg message to post (ATTENTION: can be NULL) */
DieterGraef 0:f9b6112278fe 183 err_t sys_mbox_trypost(sys_mbox_t *mbox, void *msg);
DieterGraef 0:f9b6112278fe 184 /** Wait for a new message to arrive in the mbox
DieterGraef 0:f9b6112278fe 185 * @param mbox mbox to get a message from
DieterGraef 0:f9b6112278fe 186 * @param msg pointer where the message is stored
DieterGraef 0:f9b6112278fe 187 * @param timeout maximum time (in milliseconds) to wait for a message
DieterGraef 0:f9b6112278fe 188 * @return time (in milliseconds) waited for a message, may be 0 if not waited
DieterGraef 0:f9b6112278fe 189 or SYS_ARCH_TIMEOUT on timeout
DieterGraef 0:f9b6112278fe 190 * The returned time has to be accurate to prevent timer jitter! */
DieterGraef 0:f9b6112278fe 191 u32_t sys_arch_mbox_fetch(sys_mbox_t *mbox, void **msg, u32_t timeout);
DieterGraef 0:f9b6112278fe 192 /* Allow port to override with a macro, e.g. special timout for sys_arch_mbox_fetch() */
DieterGraef 0:f9b6112278fe 193 #ifndef sys_arch_mbox_tryfetch
DieterGraef 0:f9b6112278fe 194 /** Wait for a new message to arrive in the mbox
DieterGraef 0:f9b6112278fe 195 * @param mbox mbox to get a message from
DieterGraef 0:f9b6112278fe 196 * @param msg pointer where the message is stored
DieterGraef 0:f9b6112278fe 197 * @param timeout maximum time (in milliseconds) to wait for a message
DieterGraef 0:f9b6112278fe 198 * @return 0 (milliseconds) if a message has been received
DieterGraef 0:f9b6112278fe 199 * or SYS_MBOX_EMPTY if the mailbox is empty */
DieterGraef 0:f9b6112278fe 200 u32_t sys_arch_mbox_tryfetch(sys_mbox_t *mbox, void **msg);
DieterGraef 0:f9b6112278fe 201 #endif
DieterGraef 0:f9b6112278fe 202 /** For now, we map straight to sys_arch implementation. */
DieterGraef 0:f9b6112278fe 203 #define sys_mbox_tryfetch(mbox, msg) sys_arch_mbox_tryfetch(mbox, msg)
DieterGraef 0:f9b6112278fe 204 /** Delete an mbox
DieterGraef 0:f9b6112278fe 205 * @param mbox mbox to delete */
DieterGraef 0:f9b6112278fe 206 void sys_mbox_free(sys_mbox_t *mbox);
DieterGraef 0:f9b6112278fe 207 #define sys_mbox_fetch(mbox, msg) sys_arch_mbox_fetch(mbox, msg, 0)
DieterGraef 0:f9b6112278fe 208 #ifndef sys_mbox_valid
DieterGraef 0:f9b6112278fe 209 /** Check if an mbox is valid/allocated: return 1 for valid, 0 for invalid */
DieterGraef 0:f9b6112278fe 210 int sys_mbox_valid(sys_mbox_t *mbox);
DieterGraef 0:f9b6112278fe 211 #endif
DieterGraef 0:f9b6112278fe 212 #ifndef sys_mbox_set_invalid
DieterGraef 0:f9b6112278fe 213 /** Set an mbox invalid so that sys_mbox_valid returns 0 */
DieterGraef 0:f9b6112278fe 214 void sys_mbox_set_invalid(sys_mbox_t *mbox);
DieterGraef 0:f9b6112278fe 215 #endif
DieterGraef 0:f9b6112278fe 216
DieterGraef 0:f9b6112278fe 217 /** The only thread function:
DieterGraef 0:f9b6112278fe 218 * Creates a new thread
DieterGraef 0:f9b6112278fe 219 * @param name human-readable name for the thread (used for debugging purposes)
DieterGraef 0:f9b6112278fe 220 * @param thread thread-function
DieterGraef 0:f9b6112278fe 221 * @param arg parameter passed to 'thread'
DieterGraef 0:f9b6112278fe 222 * @param stacksize stack size in bytes for the new thread (may be ignored by ports)
DieterGraef 0:f9b6112278fe 223 * @param prio priority of the new thread (may be ignored by ports) */
DieterGraef 0:f9b6112278fe 224 sys_thread_t sys_thread_new(const char *name, lwip_thread_fn thread, void *arg, int stacksize, int prio);
DieterGraef 0:f9b6112278fe 225
DieterGraef 0:f9b6112278fe 226 #endif /* NO_SYS */
DieterGraef 0:f9b6112278fe 227
DieterGraef 0:f9b6112278fe 228 /* sys_init() must be called before anthing else. */
DieterGraef 0:f9b6112278fe 229 void sys_init(void);
DieterGraef 0:f9b6112278fe 230
DieterGraef 0:f9b6112278fe 231 #ifndef sys_jiffies
DieterGraef 0:f9b6112278fe 232 /** Ticks/jiffies since power up. */
DieterGraef 0:f9b6112278fe 233 u32_t sys_jiffies(void);
DieterGraef 0:f9b6112278fe 234 #endif
DieterGraef 0:f9b6112278fe 235
DieterGraef 0:f9b6112278fe 236 /** Returns the current time in milliseconds,
DieterGraef 0:f9b6112278fe 237 * may be the same as sys_jiffies or at least based on it. */
DieterGraef 0:f9b6112278fe 238 u32_t sys_now(void);
DieterGraef 0:f9b6112278fe 239
DieterGraef 0:f9b6112278fe 240 /* Critical Region Protection */
DieterGraef 0:f9b6112278fe 241 /* These functions must be implemented in the sys_arch.c file.
DieterGraef 0:f9b6112278fe 242 In some implementations they can provide a more light-weight protection
DieterGraef 0:f9b6112278fe 243 mechanism than using semaphores. Otherwise semaphores can be used for
DieterGraef 0:f9b6112278fe 244 implementation */
DieterGraef 0:f9b6112278fe 245 #ifndef SYS_ARCH_PROTECT
DieterGraef 0:f9b6112278fe 246 /** SYS_LIGHTWEIGHT_PROT
DieterGraef 0:f9b6112278fe 247 * define SYS_LIGHTWEIGHT_PROT in lwipopts.h if you want inter-task protection
DieterGraef 0:f9b6112278fe 248 * for certain critical regions during buffer allocation, deallocation and memory
DieterGraef 0:f9b6112278fe 249 * allocation and deallocation.
DieterGraef 0:f9b6112278fe 250 */
DieterGraef 0:f9b6112278fe 251 #if SYS_LIGHTWEIGHT_PROT
DieterGraef 0:f9b6112278fe 252
DieterGraef 0:f9b6112278fe 253 /** SYS_ARCH_DECL_PROTECT
DieterGraef 0:f9b6112278fe 254 * declare a protection variable. This macro will default to defining a variable of
DieterGraef 0:f9b6112278fe 255 * type sys_prot_t. If a particular port needs a different implementation, then
DieterGraef 0:f9b6112278fe 256 * this macro may be defined in sys_arch.h.
DieterGraef 0:f9b6112278fe 257 */
DieterGraef 0:f9b6112278fe 258 #define SYS_ARCH_DECL_PROTECT(lev) sys_prot_t lev
DieterGraef 0:f9b6112278fe 259 /** SYS_ARCH_PROTECT
DieterGraef 0:f9b6112278fe 260 * Perform a "fast" protect. This could be implemented by
DieterGraef 0:f9b6112278fe 261 * disabling interrupts for an embedded system or by using a semaphore or
DieterGraef 0:f9b6112278fe 262 * mutex. The implementation should allow calling SYS_ARCH_PROTECT when
DieterGraef 0:f9b6112278fe 263 * already protected. The old protection level is returned in the variable
DieterGraef 0:f9b6112278fe 264 * "lev". This macro will default to calling the sys_arch_protect() function
DieterGraef 0:f9b6112278fe 265 * which should be implemented in sys_arch.c. If a particular port needs a
DieterGraef 0:f9b6112278fe 266 * different implementation, then this macro may be defined in sys_arch.h
DieterGraef 0:f9b6112278fe 267 */
DieterGraef 0:f9b6112278fe 268 #define SYS_ARCH_PROTECT(lev) lev = sys_arch_protect()
DieterGraef 0:f9b6112278fe 269 /** SYS_ARCH_UNPROTECT
DieterGraef 0:f9b6112278fe 270 * Perform a "fast" set of the protection level to "lev". This could be
DieterGraef 0:f9b6112278fe 271 * implemented by setting the interrupt level to "lev" within the MACRO or by
DieterGraef 0:f9b6112278fe 272 * using a semaphore or mutex. This macro will default to calling the
DieterGraef 0:f9b6112278fe 273 * sys_arch_unprotect() function which should be implemented in
DieterGraef 0:f9b6112278fe 274 * sys_arch.c. If a particular port needs a different implementation, then
DieterGraef 0:f9b6112278fe 275 * this macro may be defined in sys_arch.h
DieterGraef 0:f9b6112278fe 276 */
DieterGraef 0:f9b6112278fe 277 #define SYS_ARCH_UNPROTECT(lev) sys_arch_unprotect(lev)
DieterGraef 0:f9b6112278fe 278 sys_prot_t sys_arch_protect(void);
DieterGraef 0:f9b6112278fe 279 void sys_arch_unprotect(sys_prot_t pval);
DieterGraef 0:f9b6112278fe 280
DieterGraef 0:f9b6112278fe 281 #else
DieterGraef 0:f9b6112278fe 282
DieterGraef 0:f9b6112278fe 283 #define SYS_ARCH_DECL_PROTECT(lev)
DieterGraef 0:f9b6112278fe 284 #define SYS_ARCH_PROTECT(lev)
DieterGraef 0:f9b6112278fe 285 #define SYS_ARCH_UNPROTECT(lev)
DieterGraef 0:f9b6112278fe 286
DieterGraef 0:f9b6112278fe 287 #endif /* SYS_LIGHTWEIGHT_PROT */
DieterGraef 0:f9b6112278fe 288
DieterGraef 0:f9b6112278fe 289 #endif /* SYS_ARCH_PROTECT */
DieterGraef 0:f9b6112278fe 290
DieterGraef 0:f9b6112278fe 291 /*
DieterGraef 0:f9b6112278fe 292 * Macros to set/get and increase/decrease variables in a thread-safe way.
DieterGraef 0:f9b6112278fe 293 * Use these for accessing variable that are used from more than one thread.
DieterGraef 0:f9b6112278fe 294 */
DieterGraef 0:f9b6112278fe 295
DieterGraef 0:f9b6112278fe 296 #ifndef SYS_ARCH_INC
DieterGraef 0:f9b6112278fe 297 #define SYS_ARCH_INC(var, val) do { \
DieterGraef 0:f9b6112278fe 298 SYS_ARCH_DECL_PROTECT(old_level); \
DieterGraef 0:f9b6112278fe 299 SYS_ARCH_PROTECT(old_level); \
DieterGraef 0:f9b6112278fe 300 var += val; \
DieterGraef 0:f9b6112278fe 301 SYS_ARCH_UNPROTECT(old_level); \
DieterGraef 0:f9b6112278fe 302 } while(0)
DieterGraef 0:f9b6112278fe 303 #endif /* SYS_ARCH_INC */
DieterGraef 0:f9b6112278fe 304
DieterGraef 0:f9b6112278fe 305 #ifndef SYS_ARCH_DEC
DieterGraef 0:f9b6112278fe 306 #define SYS_ARCH_DEC(var, val) do { \
DieterGraef 0:f9b6112278fe 307 SYS_ARCH_DECL_PROTECT(old_level); \
DieterGraef 0:f9b6112278fe 308 SYS_ARCH_PROTECT(old_level); \
DieterGraef 0:f9b6112278fe 309 var -= val; \
DieterGraef 0:f9b6112278fe 310 SYS_ARCH_UNPROTECT(old_level); \
DieterGraef 0:f9b6112278fe 311 } while(0)
DieterGraef 0:f9b6112278fe 312 #endif /* SYS_ARCH_DEC */
DieterGraef 0:f9b6112278fe 313
DieterGraef 0:f9b6112278fe 314 #ifndef SYS_ARCH_GET
DieterGraef 0:f9b6112278fe 315 #define SYS_ARCH_GET(var, ret) do { \
DieterGraef 0:f9b6112278fe 316 SYS_ARCH_DECL_PROTECT(old_level); \
DieterGraef 0:f9b6112278fe 317 SYS_ARCH_PROTECT(old_level); \
DieterGraef 0:f9b6112278fe 318 ret = var; \
DieterGraef 0:f9b6112278fe 319 SYS_ARCH_UNPROTECT(old_level); \
DieterGraef 0:f9b6112278fe 320 } while(0)
DieterGraef 0:f9b6112278fe 321 #endif /* SYS_ARCH_GET */
DieterGraef 0:f9b6112278fe 322
DieterGraef 0:f9b6112278fe 323 #ifndef SYS_ARCH_SET
DieterGraef 0:f9b6112278fe 324 #define SYS_ARCH_SET(var, val) do { \
DieterGraef 0:f9b6112278fe 325 SYS_ARCH_DECL_PROTECT(old_level); \
DieterGraef 0:f9b6112278fe 326 SYS_ARCH_PROTECT(old_level); \
DieterGraef 0:f9b6112278fe 327 var = val; \
DieterGraef 0:f9b6112278fe 328 SYS_ARCH_UNPROTECT(old_level); \
DieterGraef 0:f9b6112278fe 329 } while(0)
DieterGraef 0:f9b6112278fe 330 #endif /* SYS_ARCH_SET */
DieterGraef 0:f9b6112278fe 331
DieterGraef 0:f9b6112278fe 332
DieterGraef 0:f9b6112278fe 333 #ifdef __cplusplus
DieterGraef 0:f9b6112278fe 334 }
DieterGraef 0:f9b6112278fe 335 #endif
DieterGraef 0:f9b6112278fe 336
DieterGraef 0:f9b6112278fe 337 #endif /* __LWIP_SYS_H__ */