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Added lightweight protection. In coldfire this is implemented by disabling

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interrupts. In unixsim this is implemented by using a mutex. Uses #define
SYS_LIGHTWEIGHT_PROT to enable. It is enabled in coldfire by default, but
disabled in unixsim.

Fixes bug 2005 if you enable SYS_LIGHTWEIGHT_PROT. So the bug is closed.
This commit is contained in:
davidhaas
2003-02-04 22:52:22 +00:00
parent 987e9df948
commit 98fbb855fb
4 changed files with 151 additions and 27 deletions
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8
src/include/lwip/sys.h
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@@ -103,6 +103,14 @@ u32_t sys_arch_mbox_fetch(sys_mbox_t mbox, void **msg, u32_t timeout);
void sys_mbox_free(sys_mbox_t mbox);
void sys_mbox_fetch(sys_mbox_t mbox, void **msg);
/* 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 */
u32_t sys_arch_protect(void);
void sys_arch_unprotect(u32_t pval);
/* Thread functions. */
void sys_thread_new(void (* thread)(void *arg), void *arg);