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Dependencies:   mbed

Fork of myOSC_test by Alvaro Cassinelli

EthernetNetIf/LPC2368/lwip/include/lwip/sys.h@2:44f1e5803762, 2013-08-06 (annotated)

Committer:
sfjmt
Date:
Tue Aug 06 10:12:56 2013 +0000
Revision:
2:44f1e5803762
Parent:
0:f76708a93fb3 
revision_01

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbedalvaro 0:f76708a93fb3 1 /*
mbedalvaro 0:f76708a93fb3 2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
mbedalvaro 0:f76708a93fb3 3 * All rights reserved.
mbedalvaro 0:f76708a93fb3 4 *
mbedalvaro 0:f76708a93fb3 5 * Redistribution and use in source and binary forms, with or without modification,
mbedalvaro 0:f76708a93fb3 6 * are permitted provided that the following conditions are met:
mbedalvaro 0:f76708a93fb3 7 *
mbedalvaro 0:f76708a93fb3 8 * 1. Redistributions of source code must retain the above copyright notice,
mbedalvaro 0:f76708a93fb3 9 * this list of conditions and the following disclaimer.
mbedalvaro 0:f76708a93fb3 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbedalvaro 0:f76708a93fb3 11 * this list of conditions and the following disclaimer in the documentation
mbedalvaro 0:f76708a93fb3 12 * and/or other materials provided with the distribution.
mbedalvaro 0:f76708a93fb3 13 * 3. The name of the author may not be used to endorse or promote products
mbedalvaro 0:f76708a93fb3 14 * derived from this software without specific prior written permission.
mbedalvaro 0:f76708a93fb3 15 *
mbedalvaro 0:f76708a93fb3 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
mbedalvaro 0:f76708a93fb3 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
mbedalvaro 0:f76708a93fb3 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
mbedalvaro 0:f76708a93fb3 19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
mbedalvaro 0:f76708a93fb3 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
mbedalvaro 0:f76708a93fb3 21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbedalvaro 0:f76708a93fb3 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbedalvaro 0:f76708a93fb3 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
mbedalvaro 0:f76708a93fb3 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
mbedalvaro 0:f76708a93fb3 25 * OF SUCH DAMAGE.
mbedalvaro 0:f76708a93fb3 26 *
mbedalvaro 0:f76708a93fb3 27 * This file is part of the lwIP TCP/IP stack.
mbedalvaro 0:f76708a93fb3 28 *
mbedalvaro 0:f76708a93fb3 29 * Author: Adam Dunkels <adam@sics.se>
mbedalvaro 0:f76708a93fb3 30 *
mbedalvaro 0:f76708a93fb3 31 */
mbedalvaro 0:f76708a93fb3 32 #ifndef __LWIP_SYS_H__
mbedalvaro 0:f76708a93fb3 33 #define __LWIP_SYS_H__
mbedalvaro 0:f76708a93fb3 34
mbedalvaro 0:f76708a93fb3 35 #include "lwip/opt.h"
mbedalvaro 0:f76708a93fb3 36
mbedalvaro 0:f76708a93fb3 37 #ifdef __cplusplus
mbedalvaro 0:f76708a93fb3 38 extern "C" {
mbedalvaro 0:f76708a93fb3 39 #endif
mbedalvaro 0:f76708a93fb3 40
mbedalvaro 0:f76708a93fb3 41 #if NO_SYS
mbedalvaro 0:f76708a93fb3 42
mbedalvaro 0:f76708a93fb3 43 /* For a totally minimal and standalone system, we provide null
mbedalvaro 0:f76708a93fb3 44 definitions of the sys_ functions. */
mbedalvaro 0:f76708a93fb3 45 typedef u8_t sys_sem_t;
mbedalvaro 0:f76708a93fb3 46 typedef u8_t sys_mutex_t;
mbedalvaro 0:f76708a93fb3 47 typedef u8_t sys_mbox_t;
mbedalvaro 0:f76708a93fb3 48
mbedalvaro 0:f76708a93fb3 49 #define sys_sem_new(s, c) ERR_OK
mbedalvaro 0:f76708a93fb3 50 #define sys_sem_signal(s)
mbedalvaro 0:f76708a93fb3 51 #define sys_sem_wait(s)
mbedalvaro 0:f76708a93fb3 52 #define sys_arch_sem_wait(s,t)
mbedalvaro 0:f76708a93fb3 53 #define sys_sem_free(s)
mbedalvaro 0:f76708a93fb3 54 #define sys_mutex_new(mu) ERR_OK
mbedalvaro 0:f76708a93fb3 55 #define sys_mutex_lock(mu)
mbedalvaro 0:f76708a93fb3 56 #define sys_mutex_unlock(mu)
mbedalvaro 0:f76708a93fb3 57 #define sys_mutex_free(mu)
mbedalvaro 0:f76708a93fb3 58 #define sys_mbox_new(m, s) ERR_OK
mbedalvaro 0:f76708a93fb3 59 #define sys_mbox_fetch(m,d)
mbedalvaro 0:f76708a93fb3 60 #define sys_mbox_tryfetch(m,d)
mbedalvaro 0:f76708a93fb3 61 #define sys_mbox_post(m,d)
mbedalvaro 0:f76708a93fb3 62 #define sys_mbox_trypost(m,d)
mbedalvaro 0:f76708a93fb3 63 #define sys_mbox_free(m)
mbedalvaro 0:f76708a93fb3 64
mbedalvaro 0:f76708a93fb3 65 #define sys_thread_new(n,t,a,s,p)
mbedalvaro 0:f76708a93fb3 66
mbedalvaro 0:f76708a93fb3 67 #define sys_msleep(t)
mbedalvaro 0:f76708a93fb3 68
mbedalvaro 0:f76708a93fb3 69 #else /* NO_SYS */
mbedalvaro 0:f76708a93fb3 70
mbedalvaro 0:f76708a93fb3 71 /** Return code for timeouts from sys_arch_mbox_fetch and sys_arch_sem_wait */
mbedalvaro 0:f76708a93fb3 72 #define SYS_ARCH_TIMEOUT 0xffffffffUL
mbedalvaro 0:f76708a93fb3 73
mbedalvaro 0:f76708a93fb3 74 /** sys_mbox_tryfetch() returns SYS_MBOX_EMPTY if appropriate.
mbedalvaro 0:f76708a93fb3 75 * For now we use the same magic value, but we allow this to change in future.
mbedalvaro 0:f76708a93fb3 76 */
mbedalvaro 0:f76708a93fb3 77 #define SYS_MBOX_EMPTY SYS_ARCH_TIMEOUT
mbedalvaro 0:f76708a93fb3 78
mbedalvaro 0:f76708a93fb3 79 #include "lwip/err.h"
mbedalvaro 0:f76708a93fb3 80 #include "arch/sys_arch.h"
mbedalvaro 0:f76708a93fb3 81
mbedalvaro 0:f76708a93fb3 82 /** Function prototype for thread functions */
mbedalvaro 0:f76708a93fb3 83 typedef void (*lwip_thread_fn)(void *arg);
mbedalvaro 0:f76708a93fb3 84
mbedalvaro 0:f76708a93fb3 85 /* Function prototypes for functions to be implemented by platform ports
mbedalvaro 0:f76708a93fb3 86 (in sys_arch.c) */
mbedalvaro 0:f76708a93fb3 87
mbedalvaro 0:f76708a93fb3 88 /* Mutex functions: */
mbedalvaro 0:f76708a93fb3 89
mbedalvaro 0:f76708a93fb3 90 /** Define LWIP_COMPAT_MUTEX if the port has no mutexes and binary semaphores
mbedalvaro 0:f76708a93fb3 91 should be used instead */
mbedalvaro 0:f76708a93fb3 92 #if LWIP_COMPAT_MUTEX
mbedalvaro 0:f76708a93fb3 93 /* for old ports that don't have mutexes: define them to binary semaphores */
mbedalvaro 0:f76708a93fb3 94 #define sys_mutex_t sys_sem_t
mbedalvaro 0:f76708a93fb3 95 #define sys_mutex_new(mutex) sys_sem_new(mutex, 1)
mbedalvaro 0:f76708a93fb3 96 #define sys_mutex_lock(mutex) sys_sem_wait(mutex)
mbedalvaro 0:f76708a93fb3 97 #define sys_mutex_unlock(mutex) sys_sem_signal(mutex)
mbedalvaro 0:f76708a93fb3 98 #define sys_mutex_free(mutex) sys_sem_free(mutex)
mbedalvaro 0:f76708a93fb3 99 #define sys_mutex_valid(mutex) sys_sem_valid(mutex)
mbedalvaro 0:f76708a93fb3 100 #define sys_mutex_set_invalid(mutex) sys_sem_set_invalid(mutex)
mbedalvaro 0:f76708a93fb3 101
mbedalvaro 0:f76708a93fb3 102 #else /* LWIP_COMPAT_MUTEX */
mbedalvaro 0:f76708a93fb3 103
mbedalvaro 0:f76708a93fb3 104 /** Create a new mutex
mbedalvaro 0:f76708a93fb3 105 * @param mutex pointer to the mutex to create
mbedalvaro 0:f76708a93fb3 106 * @return a new mutex */
mbedalvaro 0:f76708a93fb3 107 err_t sys_mutex_new(sys_mutex_t *mutex);
mbedalvaro 0:f76708a93fb3 108 /** Lock a mutex
mbedalvaro 0:f76708a93fb3 109 * @param mutex the mutex to lock */
mbedalvaro 0:f76708a93fb3 110 void sys_mutex_lock(sys_mutex_t *mutex);
mbedalvaro 0:f76708a93fb3 111 /** Unlock a mutex
mbedalvaro 0:f76708a93fb3 112 * @param mutex the mutex to unlock */
mbedalvaro 0:f76708a93fb3 113 void sys_mutex_unlock(sys_mutex_t *mutex);
mbedalvaro 0:f76708a93fb3 114 /** Delete a semaphore
mbedalvaro 0:f76708a93fb3 115 * @param mutex the mutex to delete */
mbedalvaro 0:f76708a93fb3 116 void sys_mutex_free(sys_mutex_t *mutex);
mbedalvaro 0:f76708a93fb3 117 #ifndef sys_mutex_valid
mbedalvaro 0:f76708a93fb3 118 /** Check if a mutex is valid/allocated: return 1 for valid, 0 for invalid */
mbedalvaro 0:f76708a93fb3 119 int sys_mutex_valid(sys_mutex_t *mutex);
mbedalvaro 0:f76708a93fb3 120 #endif
mbedalvaro 0:f76708a93fb3 121 #ifndef sys_mutex_set_invalid
mbedalvaro 0:f76708a93fb3 122 /** Set a mutex invalid so that sys_mutex_valid returns 0 */
mbedalvaro 0:f76708a93fb3 123 void sys_mutex_set_invalid(sys_mutex_t *mutex);
mbedalvaro 0:f76708a93fb3 124 #endif
mbedalvaro 0:f76708a93fb3 125 #endif /* LWIP_COMPAT_MUTEX */
mbedalvaro 0:f76708a93fb3 126
mbedalvaro 0:f76708a93fb3 127 /* Semaphore functions: */
mbedalvaro 0:f76708a93fb3 128
mbedalvaro 0:f76708a93fb3 129 /** Create a new semaphore
mbedalvaro 0:f76708a93fb3 130 * @param sem pointer to the semaphore to create
mbedalvaro 0:f76708a93fb3 131 * @param count initial count of the semaphore
mbedalvaro 0:f76708a93fb3 132 * @return ERR_OK if successful, another err_t otherwise */
mbedalvaro 0:f76708a93fb3 133 err_t sys_sem_new(sys_sem_t *sem, u8_t count);
mbedalvaro 0:f76708a93fb3 134 /** Signals a semaphore
mbedalvaro 0:f76708a93fb3 135 * @param sem the semaphore to signal */
mbedalvaro 0:f76708a93fb3 136 void sys_sem_signal(sys_sem_t *sem);
mbedalvaro 0:f76708a93fb3 137 /** Wait for a semaphore for the specified timeout
mbedalvaro 0:f76708a93fb3 138 * @param sem the semaphore to wait for
mbedalvaro 0:f76708a93fb3 139 * @param timeout timeout in milliseconds to wait (0 = wait forever)
mbedalvaro 0:f76708a93fb3 140 * @return time (in milliseconds) waited for the semaphore
mbedalvaro 0:f76708a93fb3 141 * or SYS_ARCH_TIMEOUT on timeout */
mbedalvaro 0:f76708a93fb3 142 u32_t sys_arch_sem_wait(sys_sem_t *sem, u32_t timeout);
mbedalvaro 0:f76708a93fb3 143 /** Delete a semaphore
mbedalvaro 0:f76708a93fb3 144 * @param sem semaphore to delete */
mbedalvaro 0:f76708a93fb3 145 void sys_sem_free(sys_sem_t *sem);
mbedalvaro 0:f76708a93fb3 146 /** Wait for a semaphore - forever/no timeout */
mbedalvaro 0:f76708a93fb3 147 #define sys_sem_wait(sem) sys_arch_sem_wait(sem, 0)
mbedalvaro 0:f76708a93fb3 148 #ifndef sys_sem_valid
mbedalvaro 0:f76708a93fb3 149 /** Check if a sempahore is valid/allocated: return 1 for valid, 0 for invalid */
mbedalvaro 0:f76708a93fb3 150 int sys_sem_valid(sys_sem_t *sem);
mbedalvaro 0:f76708a93fb3 151 #endif
mbedalvaro 0:f76708a93fb3 152 #ifndef sys_sem_set_invalid
mbedalvaro 0:f76708a93fb3 153 /** Set a semaphore invalid so that sys_sem_valid returns 0 */
mbedalvaro 0:f76708a93fb3 154 void sys_sem_set_invalid(sys_sem_t *sem);
mbedalvaro 0:f76708a93fb3 155 #endif
mbedalvaro 0:f76708a93fb3 156
mbedalvaro 0:f76708a93fb3 157 /* Time functions. */
mbedalvaro 0:f76708a93fb3 158 #ifndef sys_msleep
mbedalvaro 0:f76708a93fb3 159 void sys_msleep(u32_t ms); /* only has a (close to) 1 jiffy resolution. */
mbedalvaro 0:f76708a93fb3 160 #endif
mbedalvaro 0:f76708a93fb3 161
mbedalvaro 0:f76708a93fb3 162 /* Mailbox functions. */
mbedalvaro 0:f76708a93fb3 163
mbedalvaro 0:f76708a93fb3 164 /** Create a new mbox of specified size
mbedalvaro 0:f76708a93fb3 165 * @param mbox pointer to the mbox to create
mbedalvaro 0:f76708a93fb3 166 * @param size (miminum) number of messages in this mbox
mbedalvaro 0:f76708a93fb3 167 * @return ERR_OK if successful, another err_t otherwise */
mbedalvaro 0:f76708a93fb3 168 err_t sys_mbox_new(sys_mbox_t *mbox, int size);
mbedalvaro 0:f76708a93fb3 169 /** Post a message to an mbox - may not fail
mbedalvaro 0:f76708a93fb3 170 * -> blocks if full, only used from tasks not from ISR
mbedalvaro 0:f76708a93fb3 171 * @param mbox mbox to posts the message
mbedalvaro 0:f76708a93fb3 172 * @param msg message to post (ATTENTION: can be NULL) */
mbedalvaro 0:f76708a93fb3 173 void sys_mbox_post(sys_mbox_t *mbox, void *msg);
mbedalvaro 0:f76708a93fb3 174 /** Try to post a message to an mbox - may fail if full or ISR
mbedalvaro 0:f76708a93fb3 175 * @param mbox mbox to posts the message
mbedalvaro 0:f76708a93fb3 176 * @param msg message to post (ATTENTION: can be NULL) */
mbedalvaro 0:f76708a93fb3 177 err_t sys_mbox_trypost(sys_mbox_t *mbox, void *msg);
mbedalvaro 0:f76708a93fb3 178 /** Wait for a new message to arrive in the mbox
mbedalvaro 0:f76708a93fb3 179 * @param mbox mbox to get a message from
mbedalvaro 0:f76708a93fb3 180 * @param msg pointer where the message is stored
mbedalvaro 0:f76708a93fb3 181 * @param timeout maximum time (in milliseconds) to wait for a message
mbedalvaro 0:f76708a93fb3 182 * @return time (in milliseconds) waited for a message, may be 0 if not waited
mbedalvaro 0:f76708a93fb3 183 or SYS_ARCH_TIMEOUT on timeout
mbedalvaro 0:f76708a93fb3 184 * The returned time has to be accurate to prevent timer jitter! */
mbedalvaro 0:f76708a93fb3 185 u32_t sys_arch_mbox_fetch(sys_mbox_t *mbox, void **msg, u32_t timeout);
mbedalvaro 0:f76708a93fb3 186 /* Allow port to override with a macro, e.g. special timout for sys_arch_mbox_fetch() */
mbedalvaro 0:f76708a93fb3 187 #ifndef sys_arch_mbox_tryfetch
mbedalvaro 0:f76708a93fb3 188 /** Wait for a new message to arrive in the mbox
mbedalvaro 0:f76708a93fb3 189 * @param mbox mbox to get a message from
mbedalvaro 0:f76708a93fb3 190 * @param msg pointer where the message is stored
mbedalvaro 0:f76708a93fb3 191 * @param timeout maximum time (in milliseconds) to wait for a message
mbedalvaro 0:f76708a93fb3 192 * @return 0 (milliseconds) if a message has been received
mbedalvaro 0:f76708a93fb3 193 * or SYS_MBOX_EMPTY if the mailbox is empty */
mbedalvaro 0:f76708a93fb3 194 u32_t sys_arch_mbox_tryfetch(sys_mbox_t *mbox, void **msg);
mbedalvaro 0:f76708a93fb3 195 #endif
mbedalvaro 0:f76708a93fb3 196 /** For now, we map straight to sys_arch implementation. */
mbedalvaro 0:f76708a93fb3 197 #define sys_mbox_tryfetch(mbox, msg) sys_arch_mbox_tryfetch(mbox, msg)
mbedalvaro 0:f76708a93fb3 198 /** Delete an mbox
mbedalvaro 0:f76708a93fb3 199 * @param mbox mbox to delete */
mbedalvaro 0:f76708a93fb3 200 void sys_mbox_free(sys_mbox_t *mbox);
mbedalvaro 0:f76708a93fb3 201 #define sys_mbox_fetch(mbox, msg) sys_arch_mbox_fetch(mbox, msg, 0)
mbedalvaro 0:f76708a93fb3 202 #ifndef sys_mbox_valid
mbedalvaro 0:f76708a93fb3 203 /** Check if an mbox is valid/allocated: return 1 for valid, 0 for invalid */
mbedalvaro 0:f76708a93fb3 204 int sys_mbox_valid(sys_mbox_t *mbox);
mbedalvaro 0:f76708a93fb3 205 #endif
mbedalvaro 0:f76708a93fb3 206 #ifndef sys_mbox_set_invalid
mbedalvaro 0:f76708a93fb3 207 /** Set an mbox invalid so that sys_mbox_valid returns 0 */
mbedalvaro 0:f76708a93fb3 208 void sys_mbox_set_invalid(sys_mbox_t *mbox);
mbedalvaro 0:f76708a93fb3 209 #endif
mbedalvaro 0:f76708a93fb3 210
mbedalvaro 0:f76708a93fb3 211 /** The only thread function:
mbedalvaro 0:f76708a93fb3 212 * Creates a new thread
mbedalvaro 0:f76708a93fb3 213 * @param name human-readable name for the thread (used for debugging purposes)
mbedalvaro 0:f76708a93fb3 214 * @param thread thread-function
mbedalvaro 0:f76708a93fb3 215 * @param arg parameter passed to 'thread'
mbedalvaro 0:f76708a93fb3 216 * @param stacksize stack size in bytes for the new thread (may be ignored by ports)
mbedalvaro 0:f76708a93fb3 217 * @param prio priority of the new thread (may be ignored by ports) */
mbedalvaro 0:f76708a93fb3 218 sys_thread_t sys_thread_new(const char *name, lwip_thread_fn thread, void *arg, int stacksize, int prio);
mbedalvaro 0:f76708a93fb3 219
mbedalvaro 0:f76708a93fb3 220 #endif /* NO_SYS */
mbedalvaro 0:f76708a93fb3 221
mbedalvaro 0:f76708a93fb3 222 /* sys_init() must be called before anthing else. */
mbedalvaro 0:f76708a93fb3 223 void sys_init(void);
mbedalvaro 0:f76708a93fb3 224
mbedalvaro 0:f76708a93fb3 225 #ifndef sys_jiffies
mbedalvaro 0:f76708a93fb3 226 /** Ticks/jiffies since power up. */
mbedalvaro 0:f76708a93fb3 227 u32_t sys_jiffies(void);
mbedalvaro 0:f76708a93fb3 228 #endif
mbedalvaro 0:f76708a93fb3 229
mbedalvaro 0:f76708a93fb3 230 /** Returns the current time in milliseconds,
mbedalvaro 0:f76708a93fb3 231 * may be the same as sys_jiffies or at least based on it. */
mbedalvaro 0:f76708a93fb3 232 u32_t sys_now(void);
mbedalvaro 0:f76708a93fb3 233
mbedalvaro 0:f76708a93fb3 234 /* Critical Region Protection */
mbedalvaro 0:f76708a93fb3 235 /* These functions must be implemented in the sys_arch.c file.
mbedalvaro 0:f76708a93fb3 236 In some implementations they can provide a more light-weight protection
mbedalvaro 0:f76708a93fb3 237 mechanism than using semaphores. Otherwise semaphores can be used for
mbedalvaro 0:f76708a93fb3 238 implementation */
mbedalvaro 0:f76708a93fb3 239 #ifndef SYS_ARCH_PROTECT
mbedalvaro 0:f76708a93fb3 240 /** SYS_LIGHTWEIGHT_PROT
mbedalvaro 0:f76708a93fb3 241 * define SYS_LIGHTWEIGHT_PROT in lwipopts.h if you want inter-task protection
mbedalvaro 0:f76708a93fb3 242 * for certain critical regions during buffer allocation, deallocation and memory
mbedalvaro 0:f76708a93fb3 243 * allocation and deallocation.
mbedalvaro 0:f76708a93fb3 244 */
mbedalvaro 0:f76708a93fb3 245 #if SYS_LIGHTWEIGHT_PROT
mbedalvaro 0:f76708a93fb3 246
mbedalvaro 0:f76708a93fb3 247 /** SYS_ARCH_DECL_PROTECT
mbedalvaro 0:f76708a93fb3 248 * declare a protection variable. This macro will default to defining a variable of
mbedalvaro 0:f76708a93fb3 249 * type sys_prot_t. If a particular port needs a different implementation, then
mbedalvaro 0:f76708a93fb3 250 * this macro may be defined in sys_arch.h.
mbedalvaro 0:f76708a93fb3 251 */
mbedalvaro 0:f76708a93fb3 252 #define SYS_ARCH_DECL_PROTECT(lev) sys_prot_t lev
mbedalvaro 0:f76708a93fb3 253 /** SYS_ARCH_PROTECT
mbedalvaro 0:f76708a93fb3 254 * Perform a "fast" protect. This could be implemented by
mbedalvaro 0:f76708a93fb3 255 * disabling interrupts for an embedded system or by using a semaphore or
mbedalvaro 0:f76708a93fb3 256 * mutex. The implementation should allow calling SYS_ARCH_PROTECT when
mbedalvaro 0:f76708a93fb3 257 * already protected. The old protection level is returned in the variable
mbedalvaro 0:f76708a93fb3 258 * "lev". This macro will default to calling the sys_arch_protect() function
mbedalvaro 0:f76708a93fb3 259 * which should be implemented in sys_arch.c. If a particular port needs a
mbedalvaro 0:f76708a93fb3 260 * different implementation, then this macro may be defined in sys_arch.h
mbedalvaro 0:f76708a93fb3 261 */
mbedalvaro 0:f76708a93fb3 262 #define SYS_ARCH_PROTECT(lev) lev = sys_arch_protect()
mbedalvaro 0:f76708a93fb3 263 /** SYS_ARCH_UNPROTECT
mbedalvaro 0:f76708a93fb3 264 * Perform a "fast" set of the protection level to "lev". This could be
mbedalvaro 0:f76708a93fb3 265 * implemented by setting the interrupt level to "lev" within the MACRO or by
mbedalvaro 0:f76708a93fb3 266 * using a semaphore or mutex. This macro will default to calling the
mbedalvaro 0:f76708a93fb3 267 * sys_arch_unprotect() function which should be implemented in
mbedalvaro 0:f76708a93fb3 268 * sys_arch.c. If a particular port needs a different implementation, then
mbedalvaro 0:f76708a93fb3 269 * this macro may be defined in sys_arch.h
mbedalvaro 0:f76708a93fb3 270 */
mbedalvaro 0:f76708a93fb3 271 #define SYS_ARCH_UNPROTECT(lev) sys_arch_unprotect(lev)
mbedalvaro 0:f76708a93fb3 272 sys_prot_t sys_arch_protect(void);
mbedalvaro 0:f76708a93fb3 273 void sys_arch_unprotect(sys_prot_t pval);
mbedalvaro 0:f76708a93fb3 274
mbedalvaro 0:f76708a93fb3 275 #else
mbedalvaro 0:f76708a93fb3 276
mbedalvaro 0:f76708a93fb3 277 #define SYS_ARCH_DECL_PROTECT(lev)
mbedalvaro 0:f76708a93fb3 278 #define SYS_ARCH_PROTECT(lev)
mbedalvaro 0:f76708a93fb3 279 #define SYS_ARCH_UNPROTECT(lev)
mbedalvaro 0:f76708a93fb3 280
mbedalvaro 0:f76708a93fb3 281 #endif /* SYS_LIGHTWEIGHT_PROT */
mbedalvaro 0:f76708a93fb3 282
mbedalvaro 0:f76708a93fb3 283 #endif /* SYS_ARCH_PROTECT */
mbedalvaro 0:f76708a93fb3 284
mbedalvaro 0:f76708a93fb3 285 /*
mbedalvaro 0:f76708a93fb3 286 * Macros to set/get and increase/decrease variables in a thread-safe way.
mbedalvaro 0:f76708a93fb3 287 * Use these for accessing variable that are used from more than one thread.
mbedalvaro 0:f76708a93fb3 288 */
mbedalvaro 0:f76708a93fb3 289
mbedalvaro 0:f76708a93fb3 290 #ifndef SYS_ARCH_INC
mbedalvaro 0:f76708a93fb3 291 #define SYS_ARCH_INC(var, val) do { \
mbedalvaro 0:f76708a93fb3 292 SYS_ARCH_DECL_PROTECT(old_level); \
mbedalvaro 0:f76708a93fb3 293 SYS_ARCH_PROTECT(old_level); \
mbedalvaro 0:f76708a93fb3 294 var += val; \
mbedalvaro 0:f76708a93fb3 295 SYS_ARCH_UNPROTECT(old_level); \
mbedalvaro 0:f76708a93fb3 296 } while(0)
mbedalvaro 0:f76708a93fb3 297 #endif /* SYS_ARCH_INC */
mbedalvaro 0:f76708a93fb3 298
mbedalvaro 0:f76708a93fb3 299 #ifndef SYS_ARCH_DEC
mbedalvaro 0:f76708a93fb3 300 #define SYS_ARCH_DEC(var, val) do { \
mbedalvaro 0:f76708a93fb3 301 SYS_ARCH_DECL_PROTECT(old_level); \
mbedalvaro 0:f76708a93fb3 302 SYS_ARCH_PROTECT(old_level); \
mbedalvaro 0:f76708a93fb3 303 var -= val; \
mbedalvaro 0:f76708a93fb3 304 SYS_ARCH_UNPROTECT(old_level); \
mbedalvaro 0:f76708a93fb3 305 } while(0)
mbedalvaro 0:f76708a93fb3 306 #endif /* SYS_ARCH_DEC */
mbedalvaro 0:f76708a93fb3 307
mbedalvaro 0:f76708a93fb3 308 #ifndef SYS_ARCH_GET
mbedalvaro 0:f76708a93fb3 309 #define SYS_ARCH_GET(var, ret) do { \
mbedalvaro 0:f76708a93fb3 310 SYS_ARCH_DECL_PROTECT(old_level); \
mbedalvaro 0:f76708a93fb3 311 SYS_ARCH_PROTECT(old_level); \
mbedalvaro 0:f76708a93fb3 312 ret = var; \
mbedalvaro 0:f76708a93fb3 313 SYS_ARCH_UNPROTECT(old_level); \
mbedalvaro 0:f76708a93fb3 314 } while(0)
mbedalvaro 0:f76708a93fb3 315 #endif /* SYS_ARCH_GET */
mbedalvaro 0:f76708a93fb3 316
mbedalvaro 0:f76708a93fb3 317 #ifndef SYS_ARCH_SET
mbedalvaro 0:f76708a93fb3 318 #define SYS_ARCH_SET(var, val) do { \
mbedalvaro 0:f76708a93fb3 319 SYS_ARCH_DECL_PROTECT(old_level); \
mbedalvaro 0:f76708a93fb3 320 SYS_ARCH_PROTECT(old_level); \
mbedalvaro 0:f76708a93fb3 321 var = val; \
mbedalvaro 0:f76708a93fb3 322 SYS_ARCH_UNPROTECT(old_level); \
mbedalvaro 0:f76708a93fb3 323 } while(0)
mbedalvaro 0:f76708a93fb3 324 #endif /* SYS_ARCH_SET */
mbedalvaro 0:f76708a93fb3 325
mbedalvaro 0:f76708a93fb3 326
mbedalvaro 0:f76708a93fb3 327 #ifdef __cplusplus
mbedalvaro 0:f76708a93fb3 328 }
mbedalvaro 0:f76708a93fb3 329 #endif
mbedalvaro 0:f76708a93fb3 330
mbedalvaro 0:f76708a93fb3 331 #endif /* __LWIP_SYS_H__ */