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/* ISC license. */
#include <skalibs/sysdeps.h>
#ifdef SKALIBS_HASPTHREAD
#include <string.h>
#include <pthread.h>
#include <skalibs/functypes.h>
struct spawndata_s
{
pthread_cond_t cond ;
pthread_mutex_t mutex ;
generic_func_ref start ;
void *arg ;
size_t argsize ;
} ;
static void *bootstrap (void *arg)
{
struct spawndata_s *data = arg ;
char newarg[data->argsize ? data->argsize : 1] ;
memcpy(newarg, data->arg, data->argsize) ;
int e = pthread_mutex_lock(&data->mutex) ;
if (e) return 0 ;
pthread_cond_signal(&data->cond) ;
pthread_mutex_unlock(&data->mutex) ;
return (*data->start)(newarg) ;
}
int pthread_create_flat (pthread_t *restrict th, pthread_attr_t const *restrict attr, generic_func_ref start, void *restrict arg, size_t argsize)
{
struct spawndata_s data =
{
.cond = PTHREAD_COND_INITIALIZER,
.mutex = PTHREAD_MUTEX_INITIALIZER,
.start = start,
.arg = arg,
.argsize = argsize
} ;
pthread_t tth ;
int e = pthread_mutex_lock(&data.mutex) ;
if (e) return e ;
e = pthread_create(&tth, attr, &bootstrap, &data) ;
if (e) return e ;
e = pthread_cond_wait(&data.cond, &data.mutex) ;
if (e) pthread_cancel(tth) ; else *th = tth ;
pthread_mutex_unlock(&data.mutex) ;
pthread_cond_destroy(&data.cond) ;
pthread_mutex_destroy(&data.mutex) ;
return e ;
}
#endif
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