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Fix sys_mbox_post. Could cause threads to hang waiting for a mbox forever

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jani 2003-07-29 14:23:17 +00:00
parent 14f251daee
commit 0d7a60bb96
1 changed files with 11 additions and 0 deletions
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11
ports/ecos/ecos/net/lwip_tcpip/current/src/ecos/sys_arch.c
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@ -78,11 +78,22 @@ void sys_mbox_free(sys_mbox_t mbox)
cyg_mempool_var_free(var_mempool_h,(void*)mbox);
}
/*
* cyg_mbox_put should not be passed a NULL otherwise the cyg_mbox_get will not
* know if it's real data or error condition. But lwIP does pass NULL on occasion
* in cases when maybe using a semaphore would be better. So this dummy_msg replaces
* NULL data
*/
int dummy_msg = 1;
/*
* Post data to a mbox.
*/
void sys_mbox_post(sys_mbox_t mbox, void *data)
{
if (!data)
data = &dummy_msg;
while (cyg_mbox_put(mbox,data) == false);
}