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Diffstat (limited to 'firmware/octoclock/include/lwip/sys.h')
| -rw-r--r-- | firmware/octoclock/include/lwip/sys.h | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/firmware/octoclock/include/lwip/sys.h b/firmware/octoclock/include/lwip/sys.h new file mode 100644 index 000000000..0cc84ddf1 --- /dev/null +++ b/firmware/octoclock/include/lwip/sys.h @@ -0,0 +1,243 @@ +/* + * 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; +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); + +#endif /* NO_SYS */ + +/** Returns the current time in milliseconds. */ +u32_t sys_now(void); + +/* 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__ */ |