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provide heim_base_once_f

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Love Hornquist Astrand
2010-10-24 12:20:14 -07:00
parent 14b5c39f58
commit 82f7fcc9e9
1 changed files with 23 additions and 1 deletions
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24
base/heimbase.c
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@@ -297,6 +297,28 @@ heim_base_once_f(heim_base_once_t *once, void *ctx, void (*func)(void *))
#ifdef HAVE_DISPATCH_DISPATCH_H
dispatch_once_f(once, ctx, func);
#else
#error "write heim_base_once_t"
static HEIMDAL_MUTEX mutex = HEIMDAL_MUTEX_INITIALIZER;
HEIMDAL_MUTEX_lock(&mutex);
if (*once == 0) {
*once = 1;
HEIMDAL_MUTEX_unlock(&mutex);
func(ctx);
HEIMDAL_MUTEX_lock(&mutex);
*once = 2;
HEIMDAL_MUTEX_unlock(&mutex);
} else if (*once == 2) {
HEIMDAL_MUTEX_unlock(&mutex);
} else {
HEIMDAL_MUTEX_unlock(&mutex);
while (1) {
struct timeval tv = { 0, 1000 };
select(0, NULL, NULL, NULL, &tv);
HEIMDAL_MUTEX_lock(&mutex);
if (*once == 2)
break;
HEIMDAL_MUTEX_unlock(&mutex);
}
HEIMDAL_MUTEX_unlock(&mutex);
}
#endif
}