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#include "u.h"
#include <errno.h>
#include "libc.h"
#include "thread.h"
#include "threadimpl.h"
static pthread_mutex_t initmutex = PTHREAD_MUTEX_INITIALIZER;
static void
lockinit(Lock *lk)
{
pthread_mutexattr_t attr;
pthread_mutex_lock(&initmutex);
if(lk->init == 0){
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
pthread_mutex_init(&lk->mutex, &attr);
pthread_mutexattr_destroy(&attr);
lk->init = 1;
}
pthread_mutex_unlock(&initmutex);
}
int
_threadlock(Lock *lk, int block, ulong pc)
{
int r;
if(!lk->init)
lockinit(lk);
if(block){
if(pthread_mutex_lock(&lk->mutex) != 0)
abort();
return 1;
}else{
r = pthread_mutex_trylock(&lk->mutex);
if(r == 0)
return 1;
if(r == EBUSY)
return 0;
abort();
return 0;
}
}
void
_threadunlock(Lock *lk, ulong pc)
{
if(pthread_mutex_unlock(&lk->mutex) != 0)
abort();
}
void
_procsleep(_Procrendez *r)
{
/* r is protected by r->l, which we hold */
pthread_cond_init(&r->cond, 0);
r->asleep = 1;
pthread_cond_wait(&r->cond, &r->l->mutex);
pthread_cond_destroy(&r->cond);
r->asleep = 0;
}
void
_procwakeup(_Procrendez *r)
{
if(r->asleep){
r->asleep = 0;
pthread_cond_signal(&r->cond);
}
}
void
_procstart(Proc *p, void (*fn)(void*))
{
//print("pc\n");
if(pthread_create(&p->tid, nil, (void*(*)(void*))fn, p) < 0){
//print("pc1\n");
fprint(2, "pthread_create: %r\n");
abort();
}
//print("pc2\n");
}
static pthread_key_t prockey;
Proc*
_threadproc(void)
{
Proc *p;
p = pthread_getspecific(prockey);
return p;
}
void
_threadsetproc(Proc *p)
{
pthread_setspecific(prockey, p);
}
void
_pthreadinit(void)
{
pthread_key_create(&prockey, 0);
}
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