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change the mb/mq receive timeout to 0 if the re-calculated delta tick is a negative number. -- found by freescale@stmsky.com 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@128 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong 2009-10-24 23:07:12 +00:00
parent a599ab3b62
commit 17c81cfa21
1 changed files with 4 additions and 0 deletions
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4
src/ipc.c
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@ -26,6 +26,8 @@
* 2009-07-18 Bernard fix the event clear bug * 2009-07-18 Bernard fix the event clear bug
* 2009-09-09 Bernard remove fast event and fix ipc release bug * 2009-09-09 Bernard remove fast event and fix ipc release bug
* 2009-10-10 Bernard change semaphore and mutex value to unsigned value * 2009-10-10 Bernard change semaphore and mutex value to unsigned value
* 2009-10-25 Bernard change the mb/mq receive timeout to 0 if the
* re-calculated delta tick is a negative number.
*/ */
#include <rtthread.h> #include <rtthread.h>
@ -1398,6 +1400,7 @@ rt_err_t rt_mb_recv (rt_mailbox_t mb, rt_uint32_t* value, rt_int32_t timeout)
{ {
tick_delta = rt_tick_get() - tick_delta; tick_delta = rt_tick_get() - tick_delta;
timeout -= tick_delta; timeout -= tick_delta;
if (timeout < 0) timeout = 0;
} }
} }
@ -1843,6 +1846,7 @@ rt_err_t rt_mq_recv (rt_mq_t mq, void* buffer, rt_size_t size, rt_int32_t timeou
{ {
tick_delta = rt_tick_get() - tick_delta; tick_delta = rt_tick_get() - tick_delta;
timeout -= tick_delta; timeout -= tick_delta;
if (timeout < 0) timeout = 0;
} }
} }