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lwip/include/lwip/sys.h@0:d616ece2d859, 2010-09-18 (annotated)

Committer:: mbed714
Date:: Sat Sep 18 23:05:49 2010 +0000
Revision:: 0:d616ece2d859

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User	Revision	Line number	New contents of line
mbed714	0:d616ece2d859	1	/*
mbed714	0:d616ece2d859	2	* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
mbed714	0:d616ece2d859	3	* All rights reserved.
mbed714	0:d616ece2d859	4	*
mbed714	0:d616ece2d859	5	* Redistribution and use in source and binary forms, with or without modification,
mbed714	0:d616ece2d859	6	* are permitted provided that the following conditions are met:
mbed714	0:d616ece2d859	7	*
mbed714	0:d616ece2d859	8	* 1. Redistributions of source code must retain the above copyright notice,
mbed714	0:d616ece2d859	9	* this list of conditions and the following disclaimer.
mbed714	0:d616ece2d859	10	* 2. Redistributions in binary form must reproduce the above copyright notice,
mbed714	0:d616ece2d859	11	* this list of conditions and the following disclaimer in the documentation
mbed714	0:d616ece2d859	12	* and/or other materials provided with the distribution.
mbed714	0:d616ece2d859	13	* 3. The name of the author may not be used to endorse or promote products
mbed714	0:d616ece2d859	14	* derived from this software without specific prior written permission.
mbed714	0:d616ece2d859	15	*
mbed714	0:d616ece2d859	16	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
mbed714	0:d616ece2d859	17	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
mbed714	0:d616ece2d859	18	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
mbed714	0:d616ece2d859	19	* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
mbed714	0:d616ece2d859	20	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
mbed714	0:d616ece2d859	21	* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbed714	0:d616ece2d859	22	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbed714	0:d616ece2d859	23	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
mbed714	0:d616ece2d859	24	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
mbed714	0:d616ece2d859	25	* OF SUCH DAMAGE.
mbed714	0:d616ece2d859	26	*
mbed714	0:d616ece2d859	27	* This file is part of the lwIP TCP/IP stack.
mbed714	0:d616ece2d859	28	*
mbed714	0:d616ece2d859	29	* Author: Adam Dunkels <adam@sics.se>
mbed714	0:d616ece2d859	30	*
mbed714	0:d616ece2d859	31	*/
mbed714	0:d616ece2d859	32	#ifndef __LWIP_SYS_H__
mbed714	0:d616ece2d859	33	#define __LWIP_SYS_H__
mbed714	0:d616ece2d859	34
mbed714	0:d616ece2d859	35	#include "lwip/opt.h"
mbed714	0:d616ece2d859	36
mbed714	0:d616ece2d859	37	#ifdef __cplusplus
mbed714	0:d616ece2d859	38	extern "C" {
mbed714	0:d616ece2d859	39	#endif
mbed714	0:d616ece2d859	40
mbed714	0:d616ece2d859	41	#if NO_SYS
mbed714	0:d616ece2d859	42
mbed714	0:d616ece2d859	43	/* For a totally minimal and standalone system, we provide null
mbed714	0:d616ece2d859	44	definitions of the sys_ functions. */
mbed714	0:d616ece2d859	45	typedef u8_t sys_sem_t;
mbed714	0:d616ece2d859	46	typedef u8_t sys_mutex_t;
mbed714	0:d616ece2d859	47	typedef u8_t sys_mbox_t;
mbed714	0:d616ece2d859	48
mbed714	0:d616ece2d859	49	#define sys_sem_new(s, c) ERR_OK
mbed714	0:d616ece2d859	50	#define sys_sem_signal(s)
mbed714	0:d616ece2d859	51	#define sys_sem_wait(s)
mbed714	0:d616ece2d859	52	#define sys_arch_sem_wait(s,t)
mbed714	0:d616ece2d859	53	#define sys_sem_free(s)
mbed714	0:d616ece2d859	54	#define sys_mutex_new(mu) ERR_OK
mbed714	0:d616ece2d859	55	#define sys_mutex_lock(mu)
mbed714	0:d616ece2d859	56	#define sys_mutex_unlock(mu)
mbed714	0:d616ece2d859	57	#define sys_mutex_free(mu)
mbed714	0:d616ece2d859	58	#define sys_mbox_new(m, s) ERR_OK
mbed714	0:d616ece2d859	59	#define sys_mbox_fetch(m,d)
mbed714	0:d616ece2d859	60	#define sys_mbox_tryfetch(m,d)
mbed714	0:d616ece2d859	61	#define sys_mbox_post(m,d)
mbed714	0:d616ece2d859	62	#define sys_mbox_trypost(m,d)
mbed714	0:d616ece2d859	63	#define sys_mbox_free(m)
mbed714	0:d616ece2d859	64
mbed714	0:d616ece2d859	65	#define sys_thread_new(n,t,a,s,p)
mbed714	0:d616ece2d859	66
mbed714	0:d616ece2d859	67	#define sys_msleep(t)
mbed714	0:d616ece2d859	68
mbed714	0:d616ece2d859	69	#else /* NO_SYS */
mbed714	0:d616ece2d859	70
mbed714	0:d616ece2d859	71	/** Return code for timeouts from sys_arch_mbox_fetch and sys_arch_sem_wait */
mbed714	0:d616ece2d859	72	#define SYS_ARCH_TIMEOUT 0xffffffffUL
mbed714	0:d616ece2d859	73
mbed714	0:d616ece2d859	74	/** sys_mbox_tryfetch() returns SYS_MBOX_EMPTY if appropriate.
mbed714	0:d616ece2d859	75	* For now we use the same magic value, but we allow this to change in future.
mbed714	0:d616ece2d859	76	*/
mbed714	0:d616ece2d859	77	#define SYS_MBOX_EMPTY SYS_ARCH_TIMEOUT
mbed714	0:d616ece2d859	78
mbed714	0:d616ece2d859	79	#include "lwip/err.h"
mbed714	0:d616ece2d859	80	#include "arch/sys_arch.h"
mbed714	0:d616ece2d859	81
mbed714	0:d616ece2d859	82	/** Function prototype for thread functions */
mbed714	0:d616ece2d859	83	typedef void (lwip_thread_fn)(void arg);
mbed714	0:d616ece2d859	84
mbed714	0:d616ece2d859	85	/* Function prototypes for functions to be implemented by platform ports
mbed714	0:d616ece2d859	86	(in sys_arch.c) */
mbed714	0:d616ece2d859	87
mbed714	0:d616ece2d859	88	/* Mutex functions: */
mbed714	0:d616ece2d859	89
mbed714	0:d616ece2d859	90	/** Define LWIP_COMPAT_MUTEX if the port has no mutexes and binary semaphores
mbed714	0:d616ece2d859	91	should be used instead */
mbed714	0:d616ece2d859	92	#if LWIP_COMPAT_MUTEX
mbed714	0:d616ece2d859	93	/* for old ports that don't have mutexes: define them to binary semaphores */
mbed714	0:d616ece2d859	94	#define sys_mutex_t sys_sem_t
mbed714	0:d616ece2d859	95	#define sys_mutex_new(mutex) sys_sem_new(mutex, 1)
mbed714	0:d616ece2d859	96	#define sys_mutex_lock(mutex) sys_sem_wait(mutex)
mbed714	0:d616ece2d859	97	#define sys_mutex_unlock(mutex) sys_sem_signal(mutex)
mbed714	0:d616ece2d859	98	#define sys_mutex_free(mutex) sys_sem_free(mutex)
mbed714	0:d616ece2d859	99	#define sys_mutex_valid(mutex) sys_sem_valid(mutex)
mbed714	0:d616ece2d859	100	#define sys_mutex_set_invalid(mutex) sys_sem_set_invalid(mutex)
mbed714	0:d616ece2d859	101
mbed714	0:d616ece2d859	102	#else /* LWIP_COMPAT_MUTEX */
mbed714	0:d616ece2d859	103
mbed714	0:d616ece2d859	104	/** Create a new mutex
mbed714	0:d616ece2d859	105	* @param mutex pointer to the mutex to create
mbed714	0:d616ece2d859	106	* @return a new mutex */
mbed714	0:d616ece2d859	107	err_t sys_mutex_new(sys_mutex_t *mutex);
mbed714	0:d616ece2d859	108	/** Lock a mutex
mbed714	0:d616ece2d859	109	* @param mutex the mutex to lock */
mbed714	0:d616ece2d859	110	void sys_mutex_lock(sys_mutex_t *mutex);
mbed714	0:d616ece2d859	111	/** Unlock a mutex
mbed714	0:d616ece2d859	112	* @param mutex the mutex to unlock */
mbed714	0:d616ece2d859	113	void sys_mutex_unlock(sys_mutex_t *mutex);
mbed714	0:d616ece2d859	114	/** Delete a semaphore
mbed714	0:d616ece2d859	115	* @param mutex the mutex to delete */
mbed714	0:d616ece2d859	116	void sys_mutex_free(sys_mutex_t *mutex);
mbed714	0:d616ece2d859	117	#ifndef sys_mutex_valid
mbed714	0:d616ece2d859	118	/** Check if a mutex is valid/allocated: return 1 for valid, 0 for invalid */
mbed714	0:d616ece2d859	119	int sys_mutex_valid(sys_mutex_t *mutex);
mbed714	0:d616ece2d859	120	#endif
mbed714	0:d616ece2d859	121	#ifndef sys_mutex_set_invalid
mbed714	0:d616ece2d859	122	/** Set a mutex invalid so that sys_mutex_valid returns 0 */
mbed714	0:d616ece2d859	123	void sys_mutex_set_invalid(sys_mutex_t *mutex);
mbed714	0:d616ece2d859	124	#endif
mbed714	0:d616ece2d859	125	#endif /* LWIP_COMPAT_MUTEX */
mbed714	0:d616ece2d859	126
mbed714	0:d616ece2d859	127	/* Semaphore functions: */
mbed714	0:d616ece2d859	128
mbed714	0:d616ece2d859	129	/** Create a new semaphore
mbed714	0:d616ece2d859	130	* @param sem pointer to the semaphore to create
mbed714	0:d616ece2d859	131	* @param count initial count of the semaphore
mbed714	0:d616ece2d859	132	* @return ERR_OK if successful, another err_t otherwise */
mbed714	0:d616ece2d859	133	err_t sys_sem_new(sys_sem_t *sem, u8_t count);
mbed714	0:d616ece2d859	134	/** Signals a semaphore
mbed714	0:d616ece2d859	135	* @param sem the semaphore to signal */
mbed714	0:d616ece2d859	136	void sys_sem_signal(sys_sem_t *sem);
mbed714	0:d616ece2d859	137	/** Wait for a semaphore for the specified timeout
mbed714	0:d616ece2d859	138	* @param sem the semaphore to wait for
mbed714	0:d616ece2d859	139	* @param timeout timeout in milliseconds to wait (0 = wait forever)
mbed714	0:d616ece2d859	140	* @return time (in milliseconds) waited for the semaphore
mbed714	0:d616ece2d859	141	* or SYS_ARCH_TIMEOUT on timeout */
mbed714	0:d616ece2d859	142	u32_t sys_arch_sem_wait(sys_sem_t *sem, u32_t timeout);
mbed714	0:d616ece2d859	143	/** Delete a semaphore
mbed714	0:d616ece2d859	144	* @param sem semaphore to delete */
mbed714	0:d616ece2d859	145	void sys_sem_free(sys_sem_t *sem);
mbed714	0:d616ece2d859	146	/** Wait for a semaphore - forever/no timeout */
mbed714	0:d616ece2d859	147	#define sys_sem_wait(sem) sys_arch_sem_wait(sem, 0)
mbed714	0:d616ece2d859	148	#ifndef sys_sem_valid
mbed714	0:d616ece2d859	149	/** Check if a sempahore is valid/allocated: return 1 for valid, 0 for invalid */
mbed714	0:d616ece2d859	150	int sys_sem_valid(sys_sem_t *sem);
mbed714	0:d616ece2d859	151	#endif
mbed714	0:d616ece2d859	152	#ifndef sys_sem_set_invalid
mbed714	0:d616ece2d859	153	/** Set a semaphore invalid so that sys_sem_valid returns 0 */
mbed714	0:d616ece2d859	154	void sys_sem_set_invalid(sys_sem_t *sem);
mbed714	0:d616ece2d859	155	#endif
mbed714	0:d616ece2d859	156
mbed714	0:d616ece2d859	157	/* Time functions. */
mbed714	0:d616ece2d859	158	#ifndef sys_msleep
mbed714	0:d616ece2d859	159	void sys_msleep(u32_t ms); /* only has a (close to) 1 jiffy resolution. */
mbed714	0:d616ece2d859	160	#endif
mbed714	0:d616ece2d859	161
mbed714	0:d616ece2d859	162	/* Mailbox functions. */
mbed714	0:d616ece2d859	163
mbed714	0:d616ece2d859	164	/** Create a new mbox of specified size
mbed714	0:d616ece2d859	165	* @param mbox pointer to the mbox to create
mbed714	0:d616ece2d859	166	* @param size (miminum) number of messages in this mbox
mbed714	0:d616ece2d859	167	* @return ERR_OK if successful, another err_t otherwise */
mbed714	0:d616ece2d859	168	err_t sys_mbox_new(sys_mbox_t *mbox, int size);
mbed714	0:d616ece2d859	169	/** Post a message to an mbox - may not fail
mbed714	0:d616ece2d859	170	* -> blocks if full, only used from tasks not from ISR
mbed714	0:d616ece2d859	171	* @param mbox mbox to posts the message
mbed714	0:d616ece2d859	172	* @param msg message to post (ATTENTION: can be NULL) */
mbed714	0:d616ece2d859	173	void sys_mbox_post(sys_mbox_t mbox, void msg);
mbed714	0:d616ece2d859	174	/** Try to post a message to an mbox - may fail if full or ISR
mbed714	0:d616ece2d859	175	* @param mbox mbox to posts the message
mbed714	0:d616ece2d859	176	* @param msg message to post (ATTENTION: can be NULL) */
mbed714	0:d616ece2d859	177	err_t sys_mbox_trypost(sys_mbox_t mbox, void msg);
mbed714	0:d616ece2d859	178	/** Wait for a new message to arrive in the mbox
mbed714	0:d616ece2d859	179	* @param mbox mbox to get a message from
mbed714	0:d616ece2d859	180	* @param msg pointer where the message is stored
mbed714	0:d616ece2d859	181	* @param timeout maximum time (in milliseconds) to wait for a message
mbed714	0:d616ece2d859	182	* @return time (in milliseconds) waited for a message, may be 0 if not waited
mbed714	0:d616ece2d859	183	or SYS_ARCH_TIMEOUT on timeout
mbed714	0:d616ece2d859	184	* The returned time has to be accurate to prevent timer jitter! */
mbed714	0:d616ece2d859	185	u32_t sys_arch_mbox_fetch(sys_mbox_t mbox, void *msg, u32_t timeout);
mbed714	0:d616ece2d859	186	/* Allow port to override with a macro, e.g. special timout for sys_arch_mbox_fetch() */
mbed714	0:d616ece2d859	187	#ifndef sys_arch_mbox_tryfetch
mbed714	0:d616ece2d859	188	/** Wait for a new message to arrive in the mbox
mbed714	0:d616ece2d859	189	* @param mbox mbox to get a message from
mbed714	0:d616ece2d859	190	* @param msg pointer where the message is stored
mbed714	0:d616ece2d859	191	* @param timeout maximum time (in milliseconds) to wait for a message
mbed714	0:d616ece2d859	192	* @return 0 (milliseconds) if a message has been received
mbed714	0:d616ece2d859	193	* or SYS_MBOX_EMPTY if the mailbox is empty */
mbed714	0:d616ece2d859	194	u32_t sys_arch_mbox_tryfetch(sys_mbox_t mbox, void *msg);
mbed714	0:d616ece2d859	195	#endif
mbed714	0:d616ece2d859	196	/** For now, we map straight to sys_arch implementation. */
mbed714	0:d616ece2d859	197	#define sys_mbox_tryfetch(mbox, msg) sys_arch_mbox_tryfetch(mbox, msg)
mbed714	0:d616ece2d859	198	/** Delete an mbox
mbed714	0:d616ece2d859	199	* @param mbox mbox to delete */
mbed714	0:d616ece2d859	200	void sys_mbox_free(sys_mbox_t *mbox);
mbed714	0:d616ece2d859	201	#define sys_mbox_fetch(mbox, msg) sys_arch_mbox_fetch(mbox, msg, 0)
mbed714	0:d616ece2d859	202	#ifndef sys_mbox_valid
mbed714	0:d616ece2d859	203	/** Check if an mbox is valid/allocated: return 1 for valid, 0 for invalid */
mbed714	0:d616ece2d859	204	int sys_mbox_valid(sys_mbox_t *mbox);
mbed714	0:d616ece2d859	205	#endif
mbed714	0:d616ece2d859	206	#ifndef sys_mbox_set_invalid
mbed714	0:d616ece2d859	207	/** Set an mbox invalid so that sys_mbox_valid returns 0 */
mbed714	0:d616ece2d859	208	void sys_mbox_set_invalid(sys_mbox_t *mbox);
mbed714	0:d616ece2d859	209	#endif
mbed714	0:d616ece2d859	210
mbed714	0:d616ece2d859	211	/** The only thread function:
mbed714	0:d616ece2d859	212	* Creates a new thread
mbed714	0:d616ece2d859	213	* @param name human-readable name for the thread (used for debugging purposes)
mbed714	0:d616ece2d859	214	* @param thread thread-function
mbed714	0:d616ece2d859	215	* @param arg parameter passed to 'thread'
mbed714	0:d616ece2d859	216	* @param stacksize stack size in bytes for the new thread (may be ignored by ports)
mbed714	0:d616ece2d859	217	* @param prio priority of the new thread (may be ignored by ports) */
mbed714	0:d616ece2d859	218	sys_thread_t sys_thread_new(const char name, lwip_thread_fn thread, void arg, int stacksize, int prio);
mbed714	0:d616ece2d859	219
mbed714	0:d616ece2d859	220	#endif /* NO_SYS */
mbed714	0:d616ece2d859	221
mbed714	0:d616ece2d859	222	/* sys_init() must be called before anthing else. */
mbed714	0:d616ece2d859	223	void sys_init(void);
mbed714	0:d616ece2d859	224
mbed714	0:d616ece2d859	225	#ifndef sys_jiffies
mbed714	0:d616ece2d859	226	/** Ticks/jiffies since power up. */
mbed714	0:d616ece2d859	227	u32_t sys_jiffies(void);
mbed714	0:d616ece2d859	228	#endif
mbed714	0:d616ece2d859	229
mbed714	0:d616ece2d859	230	/** Returns the current time in milliseconds,
mbed714	0:d616ece2d859	231	* may be the same as sys_jiffies or at least based on it. */
mbed714	0:d616ece2d859	232	u32_t sys_now(void);
mbed714	0:d616ece2d859	233
mbed714	0:d616ece2d859	234	/* Critical Region Protection */
mbed714	0:d616ece2d859	235	/* These functions must be implemented in the sys_arch.c file.
mbed714	0:d616ece2d859	236	In some implementations they can provide a more light-weight protection
mbed714	0:d616ece2d859	237	mechanism than using semaphores. Otherwise semaphores can be used for
mbed714	0:d616ece2d859	238	implementation */
mbed714	0:d616ece2d859	239	#ifndef SYS_ARCH_PROTECT
mbed714	0:d616ece2d859	240	/** SYS_LIGHTWEIGHT_PROT
mbed714	0:d616ece2d859	241	* define SYS_LIGHTWEIGHT_PROT in lwipopts.h if you want inter-task protection
mbed714	0:d616ece2d859	242	* for certain critical regions during buffer allocation, deallocation and memory
mbed714	0:d616ece2d859	243	* allocation and deallocation.
mbed714	0:d616ece2d859	244	*/
mbed714	0:d616ece2d859	245	#if SYS_LIGHTWEIGHT_PROT
mbed714	0:d616ece2d859	246
mbed714	0:d616ece2d859	247	/** SYS_ARCH_DECL_PROTECT
mbed714	0:d616ece2d859	248	* declare a protection variable. This macro will default to defining a variable of
mbed714	0:d616ece2d859	249	* type sys_prot_t. If a particular port needs a different implementation, then
mbed714	0:d616ece2d859	250	* this macro may be defined in sys_arch.h.
mbed714	0:d616ece2d859	251	*/
mbed714	0:d616ece2d859	252	#define SYS_ARCH_DECL_PROTECT(lev) sys_prot_t lev
mbed714	0:d616ece2d859	253	/** SYS_ARCH_PROTECT
mbed714	0:d616ece2d859	254	* Perform a "fast" protect. This could be implemented by
mbed714	0:d616ece2d859	255	* disabling interrupts for an embedded system or by using a semaphore or
mbed714	0:d616ece2d859	256	* mutex. The implementation should allow calling SYS_ARCH_PROTECT when
mbed714	0:d616ece2d859	257	* already protected. The old protection level is returned in the variable
mbed714	0:d616ece2d859	258	* "lev". This macro will default to calling the sys_arch_protect() function
mbed714	0:d616ece2d859	259	* which should be implemented in sys_arch.c. If a particular port needs a
mbed714	0:d616ece2d859	260	* different implementation, then this macro may be defined in sys_arch.h
mbed714	0:d616ece2d859	261	*/
mbed714	0:d616ece2d859	262	#define SYS_ARCH_PROTECT(lev) lev = sys_arch_protect()
mbed714	0:d616ece2d859	263	/** SYS_ARCH_UNPROTECT
mbed714	0:d616ece2d859	264	* Perform a "fast" set of the protection level to "lev". This could be
mbed714	0:d616ece2d859	265	* implemented by setting the interrupt level to "lev" within the MACRO or by
mbed714	0:d616ece2d859	266	* using a semaphore or mutex. This macro will default to calling the
mbed714	0:d616ece2d859	267	* sys_arch_unprotect() function which should be implemented in
mbed714	0:d616ece2d859	268	* sys_arch.c. If a particular port needs a different implementation, then
mbed714	0:d616ece2d859	269	* this macro may be defined in sys_arch.h
mbed714	0:d616ece2d859	270	*/
mbed714	0:d616ece2d859	271	#define SYS_ARCH_UNPROTECT(lev) sys_arch_unprotect(lev)
mbed714	0:d616ece2d859	272	sys_prot_t sys_arch_protect(void);
mbed714	0:d616ece2d859	273	void sys_arch_unprotect(sys_prot_t pval);
mbed714	0:d616ece2d859	274
mbed714	0:d616ece2d859	275	#else
mbed714	0:d616ece2d859	276
mbed714	0:d616ece2d859	277	#define SYS_ARCH_DECL_PROTECT(lev)
mbed714	0:d616ece2d859	278	#define SYS_ARCH_PROTECT(lev)
mbed714	0:d616ece2d859	279	#define SYS_ARCH_UNPROTECT(lev)
mbed714	0:d616ece2d859	280
mbed714	0:d616ece2d859	281	#endif /* SYS_LIGHTWEIGHT_PROT */
mbed714	0:d616ece2d859	282
mbed714	0:d616ece2d859	283	#endif /* SYS_ARCH_PROTECT */
mbed714	0:d616ece2d859	284
mbed714	0:d616ece2d859	285	/*
mbed714	0:d616ece2d859	286	* Macros to set/get and increase/decrease variables in a thread-safe way.
mbed714	0:d616ece2d859	287	* Use these for accessing variable that are used from more than one thread.
mbed714	0:d616ece2d859	288	*/
mbed714	0:d616ece2d859	289
mbed714	0:d616ece2d859	290	#ifndef SYS_ARCH_INC
mbed714	0:d616ece2d859	291	#define SYS_ARCH_INC(var, val) do { \
mbed714	0:d616ece2d859	292	SYS_ARCH_DECL_PROTECT(old_level); \
mbed714	0:d616ece2d859	293	SYS_ARCH_PROTECT(old_level); \
mbed714	0:d616ece2d859	294	var += val; \
mbed714	0:d616ece2d859	295	SYS_ARCH_UNPROTECT(old_level); \
mbed714	0:d616ece2d859	296	} while(0)
mbed714	0:d616ece2d859	297	#endif /* SYS_ARCH_INC */
mbed714	0:d616ece2d859	298
mbed714	0:d616ece2d859	299	#ifndef SYS_ARCH_DEC
mbed714	0:d616ece2d859	300	#define SYS_ARCH_DEC(var, val) do { \
mbed714	0:d616ece2d859	301	SYS_ARCH_DECL_PROTECT(old_level); \
mbed714	0:d616ece2d859	302	SYS_ARCH_PROTECT(old_level); \
mbed714	0:d616ece2d859	303	var -= val; \
mbed714	0:d616ece2d859	304	SYS_ARCH_UNPROTECT(old_level); \
mbed714	0:d616ece2d859	305	} while(0)
mbed714	0:d616ece2d859	306	#endif /* SYS_ARCH_DEC */
mbed714	0:d616ece2d859	307
mbed714	0:d616ece2d859	308	#ifndef SYS_ARCH_GET
mbed714	0:d616ece2d859	309	#define SYS_ARCH_GET(var, ret) do { \
mbed714	0:d616ece2d859	310	SYS_ARCH_DECL_PROTECT(old_level); \
mbed714	0:d616ece2d859	311	SYS_ARCH_PROTECT(old_level); \
mbed714	0:d616ece2d859	312	ret = var; \
mbed714	0:d616ece2d859	313	SYS_ARCH_UNPROTECT(old_level); \
mbed714	0:d616ece2d859	314	} while(0)
mbed714	0:d616ece2d859	315	#endif /* SYS_ARCH_GET */
mbed714	0:d616ece2d859	316
mbed714	0:d616ece2d859	317	#ifndef SYS_ARCH_SET
mbed714	0:d616ece2d859	318	#define SYS_ARCH_SET(var, val) do { \
mbed714	0:d616ece2d859	319	SYS_ARCH_DECL_PROTECT(old_level); \
mbed714	0:d616ece2d859	320	SYS_ARCH_PROTECT(old_level); \
mbed714	0:d616ece2d859	321	var = val; \
mbed714	0:d616ece2d859	322	SYS_ARCH_UNPROTECT(old_level); \
mbed714	0:d616ece2d859	323	} while(0)
mbed714	0:d616ece2d859	324	#endif /* SYS_ARCH_SET */
mbed714	0:d616ece2d859	325
mbed714	0:d616ece2d859	326
mbed714	0:d616ece2d859	327	#ifdef __cplusplus
mbed714	0:d616ece2d859	328	}
mbed714	0:d616ece2d859	329	#endif
mbed714	0:d616ece2d859	330
mbed714	0:d616ece2d859	331	#endif /* __LWIP_SYS_H__ */

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Type:	Library
Created:	18 Sep 2010
Imports:	1
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	1

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lwip/include/lwip/sys.h@0:d616ece2d859, 2010-09-18 (annotated)

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