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lwip/include/lwip/sys.h@0:ac1725ba162c, 2010-11-09 (annotated)

Committer:: segundo
Date:: Tue Nov 09 20:54:15 2010 +0000
Revision:: 0:ac1725ba162c

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User	Revision	Line number	New contents of line
segundo	0:ac1725ba162c	1	/*
segundo	0:ac1725ba162c	2	* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
segundo	0:ac1725ba162c	3	* All rights reserved.
segundo	0:ac1725ba162c	4	*
segundo	0:ac1725ba162c	5	* Redistribution and use in source and binary forms, with or without modification,
segundo	0:ac1725ba162c	6	* are permitted provided that the following conditions are met:
segundo	0:ac1725ba162c	7	*
segundo	0:ac1725ba162c	8	* 1. Redistributions of source code must retain the above copyright notice,
segundo	0:ac1725ba162c	9	* this list of conditions and the following disclaimer.
segundo	0:ac1725ba162c	10	* 2. Redistributions in binary form must reproduce the above copyright notice,
segundo	0:ac1725ba162c	11	* this list of conditions and the following disclaimer in the documentation
segundo	0:ac1725ba162c	12	* and/or other materials provided with the distribution.
segundo	0:ac1725ba162c	13	* 3. The name of the author may not be used to endorse or promote products
segundo	0:ac1725ba162c	14	* derived from this software without specific prior written permission.
segundo	0:ac1725ba162c	15	*
segundo	0:ac1725ba162c	16	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
segundo	0:ac1725ba162c	17	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
segundo	0:ac1725ba162c	18	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
segundo	0:ac1725ba162c	19	* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
segundo	0:ac1725ba162c	20	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
segundo	0:ac1725ba162c	21	* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
segundo	0:ac1725ba162c	22	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
segundo	0:ac1725ba162c	23	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
segundo	0:ac1725ba162c	24	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
segundo	0:ac1725ba162c	25	* OF SUCH DAMAGE.
segundo	0:ac1725ba162c	26	*
segundo	0:ac1725ba162c	27	* This file is part of the lwIP TCP/IP stack.
segundo	0:ac1725ba162c	28	*
segundo	0:ac1725ba162c	29	* Author: Adam Dunkels <adam@sics.se>
segundo	0:ac1725ba162c	30	*
segundo	0:ac1725ba162c	31	*/
segundo	0:ac1725ba162c	32	#ifndef __LWIP_SYS_H__
segundo	0:ac1725ba162c	33	#define __LWIP_SYS_H__
segundo	0:ac1725ba162c	34
segundo	0:ac1725ba162c	35	#include "lwip/opt.h"
segundo	0:ac1725ba162c	36
segundo	0:ac1725ba162c	37	#ifdef __cplusplus
segundo	0:ac1725ba162c	38	extern "C" {
segundo	0:ac1725ba162c	39	#endif
segundo	0:ac1725ba162c	40
segundo	0:ac1725ba162c	41	#if NO_SYS
segundo	0:ac1725ba162c	42
segundo	0:ac1725ba162c	43	/* For a totally minimal and standalone system, we provide null
segundo	0:ac1725ba162c	44	definitions of the sys_ functions. */
segundo	0:ac1725ba162c	45	typedef u8_t sys_sem_t;
segundo	0:ac1725ba162c	46	typedef u8_t sys_mutex_t;
segundo	0:ac1725ba162c	47	typedef u8_t sys_mbox_t;
segundo	0:ac1725ba162c	48
segundo	0:ac1725ba162c	49	#define sys_sem_new(s, c) ERR_OK
segundo	0:ac1725ba162c	50	#define sys_sem_signal(s)
segundo	0:ac1725ba162c	51	#define sys_sem_wait(s)
segundo	0:ac1725ba162c	52	#define sys_arch_sem_wait(s,t)
segundo	0:ac1725ba162c	53	#define sys_sem_free(s)
segundo	0:ac1725ba162c	54	#define sys_mutex_new(mu) ERR_OK
segundo	0:ac1725ba162c	55	#define sys_mutex_lock(mu)
segundo	0:ac1725ba162c	56	#define sys_mutex_unlock(mu)
segundo	0:ac1725ba162c	57	#define sys_mutex_free(mu)
segundo	0:ac1725ba162c	58	#define sys_mbox_new(m, s) ERR_OK
segundo	0:ac1725ba162c	59	#define sys_mbox_fetch(m,d)
segundo	0:ac1725ba162c	60	#define sys_mbox_tryfetch(m,d)
segundo	0:ac1725ba162c	61	#define sys_mbox_post(m,d)
segundo	0:ac1725ba162c	62	#define sys_mbox_trypost(m,d)
segundo	0:ac1725ba162c	63	#define sys_mbox_free(m)
segundo	0:ac1725ba162c	64
segundo	0:ac1725ba162c	65	#define sys_thread_new(n,t,a,s,p)
segundo	0:ac1725ba162c	66
segundo	0:ac1725ba162c	67	#define sys_msleep(t)
segundo	0:ac1725ba162c	68
segundo	0:ac1725ba162c	69	#else /* NO_SYS */
segundo	0:ac1725ba162c	70
segundo	0:ac1725ba162c	71	/** Return code for timeouts from sys_arch_mbox_fetch and sys_arch_sem_wait */
segundo	0:ac1725ba162c	72	#define SYS_ARCH_TIMEOUT 0xffffffffUL
segundo	0:ac1725ba162c	73
segundo	0:ac1725ba162c	74	/** sys_mbox_tryfetch() returns SYS_MBOX_EMPTY if appropriate.
segundo	0:ac1725ba162c	75	* For now we use the same magic value, but we allow this to change in future.
segundo	0:ac1725ba162c	76	*/
segundo	0:ac1725ba162c	77	#define SYS_MBOX_EMPTY SYS_ARCH_TIMEOUT
segundo	0:ac1725ba162c	78
segundo	0:ac1725ba162c	79	#include "lwip/err.h"
segundo	0:ac1725ba162c	80	#include "arch/sys_arch.h"
segundo	0:ac1725ba162c	81
segundo	0:ac1725ba162c	82	/** Function prototype for thread functions */
segundo	0:ac1725ba162c	83	typedef void (lwip_thread_fn)(void arg);
segundo	0:ac1725ba162c	84
segundo	0:ac1725ba162c	85	/* Function prototypes for functions to be implemented by platform ports
segundo	0:ac1725ba162c	86	(in sys_arch.c) */
segundo	0:ac1725ba162c	87
segundo	0:ac1725ba162c	88	/* Mutex functions: */
segundo	0:ac1725ba162c	89
segundo	0:ac1725ba162c	90	/** Define LWIP_COMPAT_MUTEX if the port has no mutexes and binary semaphores
segundo	0:ac1725ba162c	91	should be used instead */
segundo	0:ac1725ba162c	92	#if LWIP_COMPAT_MUTEX
segundo	0:ac1725ba162c	93	/* for old ports that don't have mutexes: define them to binary semaphores */
segundo	0:ac1725ba162c	94	#define sys_mutex_t sys_sem_t
segundo	0:ac1725ba162c	95	#define sys_mutex_new(mutex) sys_sem_new(mutex, 1)
segundo	0:ac1725ba162c	96	#define sys_mutex_lock(mutex) sys_sem_wait(mutex)
segundo	0:ac1725ba162c	97	#define sys_mutex_unlock(mutex) sys_sem_signal(mutex)
segundo	0:ac1725ba162c	98	#define sys_mutex_free(mutex) sys_sem_free(mutex)
segundo	0:ac1725ba162c	99	#define sys_mutex_valid(mutex) sys_sem_valid(mutex)
segundo	0:ac1725ba162c	100	#define sys_mutex_set_invalid(mutex) sys_sem_set_invalid(mutex)
segundo	0:ac1725ba162c	101
segundo	0:ac1725ba162c	102	#else /* LWIP_COMPAT_MUTEX */
segundo	0:ac1725ba162c	103
segundo	0:ac1725ba162c	104	/** Create a new mutex
segundo	0:ac1725ba162c	105	* @param mutex pointer to the mutex to create
segundo	0:ac1725ba162c	106	* @return a new mutex */
segundo	0:ac1725ba162c	107	err_t sys_mutex_new(sys_mutex_t *mutex);
segundo	0:ac1725ba162c	108	/** Lock a mutex
segundo	0:ac1725ba162c	109	* @param mutex the mutex to lock */
segundo	0:ac1725ba162c	110	void sys_mutex_lock(sys_mutex_t *mutex);
segundo	0:ac1725ba162c	111	/** Unlock a mutex
segundo	0:ac1725ba162c	112	* @param mutex the mutex to unlock */
segundo	0:ac1725ba162c	113	void sys_mutex_unlock(sys_mutex_t *mutex);
segundo	0:ac1725ba162c	114	/** Delete a semaphore
segundo	0:ac1725ba162c	115	* @param mutex the mutex to delete */
segundo	0:ac1725ba162c	116	void sys_mutex_free(sys_mutex_t *mutex);
segundo	0:ac1725ba162c	117	#ifndef sys_mutex_valid
segundo	0:ac1725ba162c	118	/** Check if a mutex is valid/allocated: return 1 for valid, 0 for invalid */
segundo	0:ac1725ba162c	119	int sys_mutex_valid(sys_mutex_t *mutex);
segundo	0:ac1725ba162c	120	#endif
segundo	0:ac1725ba162c	121	#ifndef sys_mutex_set_invalid
segundo	0:ac1725ba162c	122	/** Set a mutex invalid so that sys_mutex_valid returns 0 */
segundo	0:ac1725ba162c	123	void sys_mutex_set_invalid(sys_mutex_t *mutex);
segundo	0:ac1725ba162c	124	#endif
segundo	0:ac1725ba162c	125	#endif /* LWIP_COMPAT_MUTEX */
segundo	0:ac1725ba162c	126
segundo	0:ac1725ba162c	127	/* Semaphore functions: */
segundo	0:ac1725ba162c	128
segundo	0:ac1725ba162c	129	/** Create a new semaphore
segundo	0:ac1725ba162c	130	* @param sem pointer to the semaphore to create
segundo	0:ac1725ba162c	131	* @param count initial count of the semaphore
segundo	0:ac1725ba162c	132	* @return ERR_OK if successful, another err_t otherwise */
segundo	0:ac1725ba162c	133	err_t sys_sem_new(sys_sem_t *sem, u8_t count);
segundo	0:ac1725ba162c	134	/** Signals a semaphore
segundo	0:ac1725ba162c	135	* @param sem the semaphore to signal */
segundo	0:ac1725ba162c	136	void sys_sem_signal(sys_sem_t *sem);
segundo	0:ac1725ba162c	137	/** Wait for a semaphore for the specified timeout
segundo	0:ac1725ba162c	138	* @param sem the semaphore to wait for
segundo	0:ac1725ba162c	139	* @param timeout timeout in milliseconds to wait (0 = wait forever)
segundo	0:ac1725ba162c	140	* @return time (in milliseconds) waited for the semaphore
segundo	0:ac1725ba162c	141	* or SYS_ARCH_TIMEOUT on timeout */
segundo	0:ac1725ba162c	142	u32_t sys_arch_sem_wait(sys_sem_t *sem, u32_t timeout);
segundo	0:ac1725ba162c	143	/** Delete a semaphore
segundo	0:ac1725ba162c	144	* @param sem semaphore to delete */
segundo	0:ac1725ba162c	145	void sys_sem_free(sys_sem_t *sem);
segundo	0:ac1725ba162c	146	/** Wait for a semaphore - forever/no timeout */
segundo	0:ac1725ba162c	147	#define sys_sem_wait(sem) sys_arch_sem_wait(sem, 0)
segundo	0:ac1725ba162c	148	#ifndef sys_sem_valid
segundo	0:ac1725ba162c	149	/** Check if a sempahore is valid/allocated: return 1 for valid, 0 for invalid */
segundo	0:ac1725ba162c	150	int sys_sem_valid(sys_sem_t *sem);
segundo	0:ac1725ba162c	151	#endif
segundo	0:ac1725ba162c	152	#ifndef sys_sem_set_invalid
segundo	0:ac1725ba162c	153	/** Set a semaphore invalid so that sys_sem_valid returns 0 */
segundo	0:ac1725ba162c	154	void sys_sem_set_invalid(sys_sem_t *sem);
segundo	0:ac1725ba162c	155	#endif
segundo	0:ac1725ba162c	156
segundo	0:ac1725ba162c	157	/* Time functions. */
segundo	0:ac1725ba162c	158	#ifndef sys_msleep
segundo	0:ac1725ba162c	159	void sys_msleep(u32_t ms); /* only has a (close to) 1 jiffy resolution. */
segundo	0:ac1725ba162c	160	#endif
segundo	0:ac1725ba162c	161
segundo	0:ac1725ba162c	162	/* Mailbox functions. */
segundo	0:ac1725ba162c	163
segundo	0:ac1725ba162c	164	/** Create a new mbox of specified size
segundo	0:ac1725ba162c	165	* @param mbox pointer to the mbox to create
segundo	0:ac1725ba162c	166	* @param size (miminum) number of messages in this mbox
segundo	0:ac1725ba162c	167	* @return ERR_OK if successful, another err_t otherwise */
segundo	0:ac1725ba162c	168	err_t sys_mbox_new(sys_mbox_t *mbox, int size);
segundo	0:ac1725ba162c	169	/** Post a message to an mbox - may not fail
segundo	0:ac1725ba162c	170	* -> blocks if full, only used from tasks not from ISR
segundo	0:ac1725ba162c	171	* @param mbox mbox to posts the message
segundo	0:ac1725ba162c	172	* @param msg message to post (ATTENTION: can be NULL) */
segundo	0:ac1725ba162c	173	void sys_mbox_post(sys_mbox_t mbox, void msg);
segundo	0:ac1725ba162c	174	/** Try to post a message to an mbox - may fail if full or ISR
segundo	0:ac1725ba162c	175	* @param mbox mbox to posts the message
segundo	0:ac1725ba162c	176	* @param msg message to post (ATTENTION: can be NULL) */
segundo	0:ac1725ba162c	177	err_t sys_mbox_trypost(sys_mbox_t mbox, void msg);
segundo	0:ac1725ba162c	178	/** Wait for a new message to arrive in the mbox
segundo	0:ac1725ba162c	179	* @param mbox mbox to get a message from
segundo	0:ac1725ba162c	180	* @param msg pointer where the message is stored
segundo	0:ac1725ba162c	181	* @param timeout maximum time (in milliseconds) to wait for a message
segundo	0:ac1725ba162c	182	* @return time (in milliseconds) waited for a message, may be 0 if not waited
segundo	0:ac1725ba162c	183	or SYS_ARCH_TIMEOUT on timeout
segundo	0:ac1725ba162c	184	* The returned time has to be accurate to prevent timer jitter! */
segundo	0:ac1725ba162c	185	u32_t sys_arch_mbox_fetch(sys_mbox_t mbox, void *msg, u32_t timeout);
segundo	0:ac1725ba162c	186	/* Allow port to override with a macro, e.g. special timout for sys_arch_mbox_fetch() */
segundo	0:ac1725ba162c	187	#ifndef sys_arch_mbox_tryfetch
segundo	0:ac1725ba162c	188	/** Wait for a new message to arrive in the mbox
segundo	0:ac1725ba162c	189	* @param mbox mbox to get a message from
segundo	0:ac1725ba162c	190	* @param msg pointer where the message is stored
segundo	0:ac1725ba162c	191	* @param timeout maximum time (in milliseconds) to wait for a message
segundo	0:ac1725ba162c	192	* @return 0 (milliseconds) if a message has been received
segundo	0:ac1725ba162c	193	* or SYS_MBOX_EMPTY if the mailbox is empty */
segundo	0:ac1725ba162c	194	u32_t sys_arch_mbox_tryfetch(sys_mbox_t mbox, void *msg);
segundo	0:ac1725ba162c	195	#endif
segundo	0:ac1725ba162c	196	/** For now, we map straight to sys_arch implementation. */
segundo	0:ac1725ba162c	197	#define sys_mbox_tryfetch(mbox, msg) sys_arch_mbox_tryfetch(mbox, msg)
segundo	0:ac1725ba162c	198	/** Delete an mbox
segundo	0:ac1725ba162c	199	* @param mbox mbox to delete */
segundo	0:ac1725ba162c	200	void sys_mbox_free(sys_mbox_t *mbox);
segundo	0:ac1725ba162c	201	#define sys_mbox_fetch(mbox, msg) sys_arch_mbox_fetch(mbox, msg, 0)
segundo	0:ac1725ba162c	202	#ifndef sys_mbox_valid
segundo	0:ac1725ba162c	203	/** Check if an mbox is valid/allocated: return 1 for valid, 0 for invalid */
segundo	0:ac1725ba162c	204	int sys_mbox_valid(sys_mbox_t *mbox);
segundo	0:ac1725ba162c	205	#endif
segundo	0:ac1725ba162c	206	#ifndef sys_mbox_set_invalid
segundo	0:ac1725ba162c	207	/** Set an mbox invalid so that sys_mbox_valid returns 0 */
segundo	0:ac1725ba162c	208	void sys_mbox_set_invalid(sys_mbox_t *mbox);
segundo	0:ac1725ba162c	209	#endif
segundo	0:ac1725ba162c	210
segundo	0:ac1725ba162c	211	/** The only thread function:
segundo	0:ac1725ba162c	212	* Creates a new thread
segundo	0:ac1725ba162c	213	* @param name human-readable name for the thread (used for debugging purposes)
segundo	0:ac1725ba162c	214	* @param thread thread-function
segundo	0:ac1725ba162c	215	* @param arg parameter passed to 'thread'
segundo	0:ac1725ba162c	216	* @param stacksize stack size in bytes for the new thread (may be ignored by ports)
segundo	0:ac1725ba162c	217	* @param prio priority of the new thread (may be ignored by ports) */
segundo	0:ac1725ba162c	218	sys_thread_t sys_thread_new(const char name, lwip_thread_fn thread, void arg, int stacksize, int prio);
segundo	0:ac1725ba162c	219
segundo	0:ac1725ba162c	220	#endif /* NO_SYS */
segundo	0:ac1725ba162c	221
segundo	0:ac1725ba162c	222	/* sys_init() must be called before anthing else. */
segundo	0:ac1725ba162c	223	void sys_init(void);
segundo	0:ac1725ba162c	224
segundo	0:ac1725ba162c	225	#ifndef sys_jiffies
segundo	0:ac1725ba162c	226	/** Ticks/jiffies since power up. */
segundo	0:ac1725ba162c	227	u32_t sys_jiffies(void);
segundo	0:ac1725ba162c	228	#endif
segundo	0:ac1725ba162c	229
segundo	0:ac1725ba162c	230	/** Returns the current time in milliseconds,
segundo	0:ac1725ba162c	231	* may be the same as sys_jiffies or at least based on it. */
segundo	0:ac1725ba162c	232	u32_t sys_now(void);
segundo	0:ac1725ba162c	233
segundo	0:ac1725ba162c	234	/* Critical Region Protection */
segundo	0:ac1725ba162c	235	/* These functions must be implemented in the sys_arch.c file.
segundo	0:ac1725ba162c	236	In some implementations they can provide a more light-weight protection
segundo	0:ac1725ba162c	237	mechanism than using semaphores. Otherwise semaphores can be used for
segundo	0:ac1725ba162c	238	implementation */
segundo	0:ac1725ba162c	239	#ifndef SYS_ARCH_PROTECT
segundo	0:ac1725ba162c	240	/** SYS_LIGHTWEIGHT_PROT
segundo	0:ac1725ba162c	241	* define SYS_LIGHTWEIGHT_PROT in lwipopts.h if you want inter-task protection
segundo	0:ac1725ba162c	242	* for certain critical regions during buffer allocation, deallocation and memory
segundo	0:ac1725ba162c	243	* allocation and deallocation.
segundo	0:ac1725ba162c	244	*/
segundo	0:ac1725ba162c	245	#if SYS_LIGHTWEIGHT_PROT
segundo	0:ac1725ba162c	246
segundo	0:ac1725ba162c	247	/** SYS_ARCH_DECL_PROTECT
segundo	0:ac1725ba162c	248	* declare a protection variable. This macro will default to defining a variable of
segundo	0:ac1725ba162c	249	* type sys_prot_t. If a particular port needs a different implementation, then
segundo	0:ac1725ba162c	250	* this macro may be defined in sys_arch.h.
segundo	0:ac1725ba162c	251	*/
segundo	0:ac1725ba162c	252	#define SYS_ARCH_DECL_PROTECT(lev) sys_prot_t lev
segundo	0:ac1725ba162c	253	/** SYS_ARCH_PROTECT
segundo	0:ac1725ba162c	254	* Perform a "fast" protect. This could be implemented by
segundo	0:ac1725ba162c	255	* disabling interrupts for an embedded system or by using a semaphore or
segundo	0:ac1725ba162c	256	* mutex. The implementation should allow calling SYS_ARCH_PROTECT when
segundo	0:ac1725ba162c	257	* already protected. The old protection level is returned in the variable
segundo	0:ac1725ba162c	258	* "lev". This macro will default to calling the sys_arch_protect() function
segundo	0:ac1725ba162c	259	* which should be implemented in sys_arch.c. If a particular port needs a
segundo	0:ac1725ba162c	260	* different implementation, then this macro may be defined in sys_arch.h
segundo	0:ac1725ba162c	261	*/
segundo	0:ac1725ba162c	262	#define SYS_ARCH_PROTECT(lev) lev = sys_arch_protect()
segundo	0:ac1725ba162c	263	/** SYS_ARCH_UNPROTECT
segundo	0:ac1725ba162c	264	* Perform a "fast" set of the protection level to "lev". This could be
segundo	0:ac1725ba162c	265	* implemented by setting the interrupt level to "lev" within the MACRO or by
segundo	0:ac1725ba162c	266	* using a semaphore or mutex. This macro will default to calling the
segundo	0:ac1725ba162c	267	* sys_arch_unprotect() function which should be implemented in
segundo	0:ac1725ba162c	268	* sys_arch.c. If a particular port needs a different implementation, then
segundo	0:ac1725ba162c	269	* this macro may be defined in sys_arch.h
segundo	0:ac1725ba162c	270	*/
segundo	0:ac1725ba162c	271	#define SYS_ARCH_UNPROTECT(lev) sys_arch_unprotect(lev)
segundo	0:ac1725ba162c	272	sys_prot_t sys_arch_protect(void);
segundo	0:ac1725ba162c	273	void sys_arch_unprotect(sys_prot_t pval);
segundo	0:ac1725ba162c	274
segundo	0:ac1725ba162c	275	#else
segundo	0:ac1725ba162c	276
segundo	0:ac1725ba162c	277	#define SYS_ARCH_DECL_PROTECT(lev)
segundo	0:ac1725ba162c	278	#define SYS_ARCH_PROTECT(lev)
segundo	0:ac1725ba162c	279	#define SYS_ARCH_UNPROTECT(lev)
segundo	0:ac1725ba162c	280
segundo	0:ac1725ba162c	281	#endif /* SYS_LIGHTWEIGHT_PROT */
segundo	0:ac1725ba162c	282
segundo	0:ac1725ba162c	283	#endif /* SYS_ARCH_PROTECT */
segundo	0:ac1725ba162c	284
segundo	0:ac1725ba162c	285	/*
segundo	0:ac1725ba162c	286	* Macros to set/get and increase/decrease variables in a thread-safe way.
segundo	0:ac1725ba162c	287	* Use these for accessing variable that are used from more than one thread.
segundo	0:ac1725ba162c	288	*/
segundo	0:ac1725ba162c	289
segundo	0:ac1725ba162c	290	#ifndef SYS_ARCH_INC
segundo	0:ac1725ba162c	291	#define SYS_ARCH_INC(var, val) do { \
segundo	0:ac1725ba162c	292	SYS_ARCH_DECL_PROTECT(old_level); \
segundo	0:ac1725ba162c	293	SYS_ARCH_PROTECT(old_level); \
segundo	0:ac1725ba162c	294	var += val; \
segundo	0:ac1725ba162c	295	SYS_ARCH_UNPROTECT(old_level); \
segundo	0:ac1725ba162c	296	} while(0)
segundo	0:ac1725ba162c	297	#endif /* SYS_ARCH_INC */
segundo	0:ac1725ba162c	298
segundo	0:ac1725ba162c	299	#ifndef SYS_ARCH_DEC
segundo	0:ac1725ba162c	300	#define SYS_ARCH_DEC(var, val) do { \
segundo	0:ac1725ba162c	301	SYS_ARCH_DECL_PROTECT(old_level); \
segundo	0:ac1725ba162c	302	SYS_ARCH_PROTECT(old_level); \
segundo	0:ac1725ba162c	303	var -= val; \
segundo	0:ac1725ba162c	304	SYS_ARCH_UNPROTECT(old_level); \
segundo	0:ac1725ba162c	305	} while(0)
segundo	0:ac1725ba162c	306	#endif /* SYS_ARCH_DEC */
segundo	0:ac1725ba162c	307
segundo	0:ac1725ba162c	308	#ifndef SYS_ARCH_GET
segundo	0:ac1725ba162c	309	#define SYS_ARCH_GET(var, ret) do { \
segundo	0:ac1725ba162c	310	SYS_ARCH_DECL_PROTECT(old_level); \
segundo	0:ac1725ba162c	311	SYS_ARCH_PROTECT(old_level); \
segundo	0:ac1725ba162c	312	ret = var; \
segundo	0:ac1725ba162c	313	SYS_ARCH_UNPROTECT(old_level); \
segundo	0:ac1725ba162c	314	} while(0)
segundo	0:ac1725ba162c	315	#endif /* SYS_ARCH_GET */
segundo	0:ac1725ba162c	316
segundo	0:ac1725ba162c	317	#ifndef SYS_ARCH_SET
segundo	0:ac1725ba162c	318	#define SYS_ARCH_SET(var, val) do { \
segundo	0:ac1725ba162c	319	SYS_ARCH_DECL_PROTECT(old_level); \
segundo	0:ac1725ba162c	320	SYS_ARCH_PROTECT(old_level); \
segundo	0:ac1725ba162c	321	var = val; \
segundo	0:ac1725ba162c	322	SYS_ARCH_UNPROTECT(old_level); \
segundo	0:ac1725ba162c	323	} while(0)
segundo	0:ac1725ba162c	324	#endif /* SYS_ARCH_SET */
segundo	0:ac1725ba162c	325
segundo	0:ac1725ba162c	326
segundo	0:ac1725ba162c	327	#ifdef __cplusplus
segundo	0:ac1725ba162c	328	}
segundo	0:ac1725ba162c	329	#endif
segundo	0:ac1725ba162c	330
segundo	0:ac1725ba162c	331	#endif /* __LWIP_SYS_H__ */

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Type:	Library
Created:	09 Nov 2010
Imports:	3034
Forks:	1
Commits:	8
Dependents:	42
Dependencies:	0
Followers:	27

lwip/include/lwip/sys.h@0:ac1725ba162c, 2010-11-09 (annotated)

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