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/**
pthread.c
Copyright (C) 1999, RTFM, Inc.
All Rights Reserved.
ekr@rtfm.com Tue Feb 23 15:08:03 1999
*/
#include <r_common.h>
#include <r_thread.h>
#include <pthread.h>
static int thread_count = 0;
typedef struct {
void(*func) PROTO_LIST((void *));
void *arg;
} helper;
static void *r_thread_real_create PROTO_LIST((void *arg));
static void *r_thread_real_create(void *arg) {
helper *h;
h = (helper *)arg;
thread_count++;
h->func(h->arg);
thread_count--;
free(h);
return 0;
}
int r_thread_fork(func, arg, id) void(*func) PROTO_LIST((void *));
void *arg;
r_thread *id;
{
pthread_t thread;
helper *h;
int r, _status;
h = (helper *)malloc(sizeof(helper));
h->func = func;
h->arg = arg;
if(r = pthread_create(&thread, 0, r_thread_real_create, (void *)h))
ABORT(R_INTERNAL);
_status = 0;
abort:
return _status;
}
int r_thread_yield(void) {
pthread_yield();
}
int r_thread_exit(void) {
thread_count--;
pthread_exit(0);
return 0;
}
int r_thread_wait_last(void) {
do {
pthread_yield();
usleep(10000);
DBG((0, "%d threads left", thread_count));
} while(thread_count);
return 0;
}
int r_rwlock_create(r_rwlock **lockp) {
pthread_rwlock_t *lock;
int r;
if(!(lock = (pthread_rwlock_t *)malloc(sizeof(pthread_rwlock_t))))
ERETURN(R_NO_MEMORY);
if(r = pthread_rwlock_init(lock, 0))
ERETURN(R_INTERNAL);
*lockp = (void *)lock;
return 0;
}
int r_rwlock_destroy(r_rwlock **lock) {
pthread_rwlock_t *plock;
if(!lock || !*lock)
return 0;
plock = (pthread_rwlock_t *)(*lock);
pthread_rwlock_destroy(plock);
return 0;
}
int r_rwlock_lock(r_rwlock *lock, int action) {
pthread_rwlock_t *plock;
int r, _status;
plock = (pthread_rwlock_t *)lock;
switch(action) {
case R_RWLOCK_UNLOCK:
if(r = pthread_rwlock_unlock(plock))
ABORT(R_INTERNAL);
break;
case R_RWLOCK_RLOCK:
if(r = pthread_rwlock_rdlock(plock))
ABORT(R_INTERNAL);
break;
case R_RWLOCK_WLOCK:
if(r = pthread_rwlock_wrlock(plock))
ABORT(R_INTERNAL);
break;
default:
ABORT(R_BAD_ARGS);
}
_status = 0;
abort:
return _status;
}
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