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/* Written by Kris Maglione <maglione.k at Gmail> */
/* Public domain */
#define _XOPEN_SOURCE 600
#include <errno.h>
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include "ixp_local.h"
static IxpThread ixp_pthread;
static pthread_key_t errstr_k;
/**
* Function: ixp_pthread_init
*
* This function initializes libixp for use in multithreaded
* programs using the POSIX thread system. When using libixp in such
* programs, this function must be called before any other libixp
* functions. This function is part of libixp_pthread, which you
* must explicitly link against.
*/
int
ixp_pthread_init() {
int ret;
IXP_ASSERT_VERSION;
ret = pthread_key_create(&errstr_k, free);
if(ret) {
werrstr("can't create TLS value: %s", ixp_errbuf());
return 1;
}
ixp_thread = &ixp_pthread;
return 0;
}
static char*
errbuf(void) {
char *ret;
ret = pthread_getspecific(errstr_k);
if(ret == nil) {
ret = emallocz(IXP_ERRMAX);
pthread_setspecific(errstr_k, (void*)ret);
}
return ret;
}
static void
mlock(IxpMutex *m) {
pthread_mutex_lock(m->aux);
}
static int
mcanlock(IxpMutex *m) {
return !pthread_mutex_trylock(m->aux);
}
static void
munlock(IxpMutex *m) {
pthread_mutex_unlock(m->aux);
}
static void
mdestroy(IxpMutex *m) {
pthread_mutex_destroy(m->aux);
free(m->aux);
}
static int
initmutex(IxpMutex *m) {
pthread_mutex_t *mutex;
mutex = emalloc(sizeof *mutex);
if(pthread_mutex_init(mutex, nil)) {
free(mutex);
return 1;
}
m->aux = mutex;
return 0;
}
static void
rlock(IxpRWLock *rw) {
pthread_rwlock_rdlock(rw->aux);
}
static int
canrlock(IxpRWLock *rw) {
return !pthread_rwlock_tryrdlock(rw->aux);
}
static void
wlock(IxpRWLock *rw) {
pthread_rwlock_rdlock(rw->aux);
}
static int
canwlock(IxpRWLock *rw) {
return !pthread_rwlock_tryrdlock(rw->aux);
}
static void
rwunlock(IxpRWLock *rw) {
pthread_rwlock_unlock(rw->aux);
}
static void
rwdestroy(IxpRWLock *rw) {
pthread_rwlock_destroy(rw->aux);
free(rw->aux);
}
static int
initrwlock(IxpRWLock *rw) {
pthread_rwlock_t *rwlock;
rwlock = emalloc(sizeof *rwlock);
if(pthread_rwlock_init(rwlock, nil)) {
free(rwlock);
return 1;
}
rw->aux = rwlock;
return 0;
}
static void
rsleep(IxpRendez *r) {
pthread_cond_wait(r->aux, r->mutex->aux);
}
static int
rwake(IxpRendez *r) {
pthread_cond_signal(r->aux);
return 0;
}
static int
rwakeall(IxpRendez *r) {
pthread_cond_broadcast(r->aux);
return 0;
}
static void
rdestroy(IxpRendez *r) {
pthread_cond_destroy(r->aux);
free(r->aux);
}
static int
initrendez(IxpRendez *r) {
pthread_cond_t *cond;
cond = emalloc(sizeof *cond);
if(pthread_cond_init(cond, nil)) {
free(cond);
return 1;
}
r->aux = cond;
return 0;
}
static IxpThread ixp_pthread = {
/* Mutex */
.initmutex = initmutex,
.lock = mlock,
.canlock = mcanlock,
.unlock = munlock,
.mdestroy = mdestroy,
/* RWLock */
.initrwlock = initrwlock,
.rlock = rlock,
.canrlock = canrlock,
.wlock = wlock,
.canwlock = canwlock,
.runlock = rwunlock,
.wunlock = rwunlock,
.rwdestroy = rwdestroy,
/* Rendez */
.initrendez = initrendez,
.sleep = rsleep,
.wake = rwake,
.wakeall = rwakeall,
.rdestroy = rdestroy,
/* Other */
.errbuf = errbuf,
.read = read,
.write = write,
.select = select,
};
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