+++ /dev/null
-/*
- * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification,
- * are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. 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.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
- *
- * This file is part of the lwIP TCP/IP stack.
- *
- * Author: Adam Dunkels <adam@sics.se>
- *
- */
-#ifndef __LWIP_SYS_H__
-#define __LWIP_SYS_H__
-
-#include "lwip/opt.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#if NO_SYS
-
-/* For a totally minimal and standalone system, we provide null
- definitions of the sys_ functions. */
-typedef u8_t sys_sem_t;
-typedef u8_t sys_mbox_t;
-typedef u8_t sys_prot_t;
-struct sys_timeo {u8_t dummy;};
-
-#define sys_init()
-#define sys_timeout(m,h,a)
-#define sys_untimeout(m,a)
-#define sys_sem_new(c) c
-#define sys_sem_signal(s)
-#define sys_sem_wait(s)
-#define sys_sem_wait_timeout(s,t)
-#define sys_arch_sem_wait(s,t)
-#define sys_sem_free(s)
-#define sys_mbox_new(s) 0
-#define sys_mbox_fetch(m,d)
-#define sys_mbox_tryfetch(m,d)
-#define sys_mbox_post(m,d)
-#define sys_mbox_trypost(m,d)
-#define sys_mbox_free(m)
-
-#define sys_thread_new(n,t,a,s,p)
-
-#else /* NO_SYS */
-
-/** Return code for timeouts from sys_arch_mbox_fetch and sys_arch_sem_wait */
-#define SYS_ARCH_TIMEOUT 0xffffffffUL
-
-/* sys_mbox_tryfetch returns SYS_MBOX_EMPTY if appropriate.
- * For now we use the same magic value, but we allow this to change in future.
- */
-#define SYS_MBOX_EMPTY SYS_ARCH_TIMEOUT
-
-#include "lwip/err.h"
-#include "arch/sys_arch.h"
-
-typedef void (* sys_timeout_handler)(void *arg);
-
-struct sys_timeo {
- struct sys_timeo *next;
- u32_t time;
- sys_timeout_handler h;
- void *arg;
-};
-
-struct sys_timeouts {
- struct sys_timeo *next;
-};
-
-/* sys_init() must be called before anthing else. */
-void sys_init(void);
-
-/*
- * sys_timeout():
- *
- * Schedule a timeout a specified amount of milliseconds in the
- * future. When the timeout occurs, the specified timeout handler will
- * be called. The handler will be passed the "arg" argument when
- * called.
- *
- */
-void sys_timeout(u32_t msecs, sys_timeout_handler h, void *arg);
-void sys_untimeout(sys_timeout_handler h, void *arg);
-struct sys_timeouts *sys_arch_timeouts(void);
-
-/* Semaphore functions. */
-sys_sem_t sys_sem_new(u8_t count);
-void sys_sem_signal(sys_sem_t sem);
-u32_t sys_arch_sem_wait(sys_sem_t sem, u32_t timeout);
-void sys_sem_free(sys_sem_t sem);
-void sys_sem_wait(sys_sem_t sem);
-int sys_sem_wait_timeout(sys_sem_t sem, u32_t timeout);
-
-/* Time functions. */
-#ifndef sys_msleep
-void sys_msleep(u32_t ms); /* only has a (close to) 1 jiffy resolution. */
-#endif
-#ifndef sys_jiffies
-u32_t sys_jiffies(void); /* since power up. */
-#endif
-
-/* Mailbox functions. */
-sys_mbox_t sys_mbox_new(int size);
-void sys_mbox_post(sys_mbox_t mbox, void *msg);
-err_t sys_mbox_trypost(sys_mbox_t mbox, void *msg);
-u32_t sys_arch_mbox_fetch(sys_mbox_t mbox, void **msg, u32_t timeout);
-#ifndef sys_arch_mbox_tryfetch /* Allow port to override with a macro */
-u32_t sys_arch_mbox_tryfetch(sys_mbox_t mbox, void **msg);
-#endif
-/* For now, we map straight to sys_arch implementation. */
-#define sys_mbox_tryfetch(mbox, msg) sys_arch_mbox_tryfetch(mbox, msg)
-void sys_mbox_free(sys_mbox_t mbox);
-void sys_mbox_fetch(sys_mbox_t mbox, void **msg);
-
-/* Thread functions. */
-sys_thread_t sys_thread_new(char *name, void (* thread)(void *arg), void *arg, int stacksize, int prio);
-
-/* The following functions are used only in Unix code, and
- can be omitted when porting the stack. */
-/* Returns the current time in microseconds. */
-unsigned long sys_now(void);
-
-#endif /* NO_SYS */
-
-/* Critical Region Protection */
-/* These functions must be implemented in the sys_arch.c file.
- In some implementations they can provide a more light-weight protection
- mechanism than using semaphores. Otherwise semaphores can be used for
- implementation */
-#ifndef SYS_ARCH_PROTECT
-/** SYS_LIGHTWEIGHT_PROT
- * define SYS_LIGHTWEIGHT_PROT in lwipopts.h if you want inter-task protection
- * for certain critical regions during buffer allocation, deallocation and memory
- * allocation and deallocation.
- */
-#if SYS_LIGHTWEIGHT_PROT
-
-/** SYS_ARCH_DECL_PROTECT
- * declare a protection variable. This macro will default to defining a variable of
- * type sys_prot_t. If a particular port needs a different implementation, then
- * this macro may be defined in sys_arch.h.
- */
-#define SYS_ARCH_DECL_PROTECT(lev) sys_prot_t lev
-/** SYS_ARCH_PROTECT
- * Perform a "fast" protect. This could be implemented by
- * disabling interrupts for an embedded system or by using a semaphore or
- * mutex. The implementation should allow calling SYS_ARCH_PROTECT when
- * already protected. The old protection level is returned in the variable
- * "lev". This macro will default to calling the sys_arch_protect() function
- * which should be implemented in sys_arch.c. If a particular port needs a
- * different implementation, then this macro may be defined in sys_arch.h
- */
-#define SYS_ARCH_PROTECT(lev) lev = sys_arch_protect()
-/** SYS_ARCH_UNPROTECT
- * Perform a "fast" set of the protection level to "lev". This could be
- * implemented by setting the interrupt level to "lev" within the MACRO or by
- * using a semaphore or mutex. This macro will default to calling the
- * sys_arch_unprotect() function which should be implemented in
- * sys_arch.c. If a particular port needs a different implementation, then
- * this macro may be defined in sys_arch.h
- */
-#define SYS_ARCH_UNPROTECT(lev) sys_arch_unprotect(lev)
-sys_prot_t sys_arch_protect(void);
-void sys_arch_unprotect(sys_prot_t pval);
-
-#else
-
-#define SYS_ARCH_DECL_PROTECT(lev)
-#define SYS_ARCH_PROTECT(lev)
-#define SYS_ARCH_UNPROTECT(lev)
-
-#endif /* SYS_LIGHTWEIGHT_PROT */
-
-#endif /* SYS_ARCH_PROTECT */
-
-/*
- * Macros to set/get and increase/decrease variables in a thread-safe way.
- * Use these for accessing variable that are used from more than one thread.
- */
-
-#ifndef SYS_ARCH_INC
-#define SYS_ARCH_INC(var, val) do { \
- SYS_ARCH_DECL_PROTECT(old_level); \
- SYS_ARCH_PROTECT(old_level); \
- var += val; \
- SYS_ARCH_UNPROTECT(old_level); \
- } while(0)
-#endif /* SYS_ARCH_INC */
-
-#ifndef SYS_ARCH_DEC
-#define SYS_ARCH_DEC(var, val) do { \
- SYS_ARCH_DECL_PROTECT(old_level); \
- SYS_ARCH_PROTECT(old_level); \
- var -= val; \
- SYS_ARCH_UNPROTECT(old_level); \
- } while(0)
-#endif /* SYS_ARCH_DEC */
-
-#ifndef SYS_ARCH_GET
-#define SYS_ARCH_GET(var, ret) do { \
- SYS_ARCH_DECL_PROTECT(old_level); \
- SYS_ARCH_PROTECT(old_level); \
- ret = var; \
- SYS_ARCH_UNPROTECT(old_level); \
- } while(0)
-#endif /* SYS_ARCH_GET */
-
-#ifndef SYS_ARCH_SET
-#define SYS_ARCH_SET(var, val) do { \
- SYS_ARCH_DECL_PROTECT(old_level); \
- SYS_ARCH_PROTECT(old_level); \
- var = val; \
- SYS_ARCH_UNPROTECT(old_level); \
- } while(0)
-#endif /* SYS_ARCH_SET */
-
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* __LWIP_SYS_H__ */