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Port mq_get() to MinGW.

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This commit is contained in:
Jason Evans
2015-07-21 16:45:35 -07:00
parent 00632609df
commit 1b0e4abbfd
3 changed files with 39 additions and 13 deletions
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19
test/include/test/mq.h
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@@ -1,3 +1,5 @@
void mq_nanosleep(unsigned ns);
/*
* Simple templated message queue implementation that relies on only mutexes for
* synchronization (which reduces portability issues). Given the following
@@ -75,26 +77,23 @@ a_attr a_mq_msg_type * \
a_prefix##get(a_mq_type *mq) \
{ \
a_mq_msg_type *msg; \
struct timespec timeout; \
unsigned ns; \
\
msg = a_prefix##tryget(mq); \
if (msg != NULL) \
return (msg); \
\
timeout.tv_sec = 0; \
timeout.tv_nsec = 1; \
ns = 1; \
while (true) { \
nanosleep(&timeout, NULL); \
mq_nanosleep(ns); \
msg = a_prefix##tryget(mq); \
if (msg != NULL) \
return (msg); \
if (timeout.tv_sec == 0) { \
if (ns < 1000*1000*1000) { \
/* Double sleep time, up to max 1 second. */ \
timeout.tv_nsec <<= 1; \
if (timeout.tv_nsec >= 1000*1000*1000) { \
timeout.tv_sec = 1; \
timeout.tv_nsec = 0; \
} \
ns <<= 1; \
if (ns > 1000*1000*1000) \
ns = 1000*1000*1000; \
} \
} \
} \