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$NetBSD: patch-ah,v 1.3 2004/04/20 12:15:51 markd Exp $
--- mcop_mt/threads_posix.cc.orig 2004-04-04 19:37:55.000000000 +1200
+++ mcop_mt/threads_posix.cc
@@ -33,7 +33,151 @@
#include <stddef.h>
#include <stdarg.h>
#include <pthread.h>
+#include <unistd.h>
+#ifdef _POSIX_SEMAPHORES
#include <semaphore.h>
+#else
+
+#include <errno.h>
+#include <limits.h>
+
+struct sem_t {
+ pthread_mutex_t lock;
+ pthread_cond_t gtzero;
+ unsigned int count;
+ unsigned int nwaiters;
+};
+
+static int sem_init(sem_t *, int, unsigned int);
+static int sem_destroy(sem_t *);
+static int sem_wait(sem_t *);
+static int sem_trywait(sem_t *);
+static int sem_post(sem_t *);
+static int sem_getvalue(sem_t *, int *);
+
+static int
+sem_init(sem_t *sem, int pshared, unsigned int value)
+{
+
+ /*
+ * Range check the arguments.
+ */
+ if (pshared != 0) {
+ errno = EPERM;
+ return -1;
+ }
+
+ if (value > INT_MAX) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ /*
+ * Initialize the semaphore.
+ */
+ if (pthread_mutex_init(&sem->lock, NULL) != 0) {
+ errno = ENOMEM;
+ return -1;
+ }
+
+ if (pthread_cond_init(&sem->gtzero, NULL) != 0) {
+ pthread_mutex_destroy(&sem->lock);
+ errno = ENOMEM;
+ return -1;
+ }
+
+ sem->count = value;
+ sem->nwaiters = 0;
+
+ return 0;
+}
+
+static int
+sem_destroy(sem_t *sem)
+{
+
+ /* Make sure there are no waiters. */
+ pthread_mutex_lock(&sem->lock);
+ if (sem->nwaiters > 0) {
+ pthread_mutex_unlock(&sem->lock);
+ errno = EBUSY;
+ return -1;
+ }
+ pthread_mutex_unlock(&sem->lock);
+
+ pthread_mutex_destroy(&sem->lock);
+ pthread_cond_destroy(&sem->gtzero);
+
+ return 0;
+}
+
+static int
+sem_wait(sem_t *sem)
+{
+ pthread_testcancel();
+
+ pthread_mutex_lock(&sem->lock);
+
+ while (sem->count == 0) {
+ sem->nwaiters++;
+ pthread_cond_wait(&sem->gtzero, &sem->lock);
+ }
+ sem->count--;
+
+ pthread_mutex_unlock(&sem->lock);
+
+ pthread_testcancel();
+ return 0;
+}
+
+static int
+sem_trywait(sem_t *sem)
+{
+ int retval;
+
+ pthread_mutex_lock(&sem->lock);
+
+ if (sem->count > 0) {
+ sem->count--;
+ retval = 0;
+ } else {
+ errno = EAGAIN;
+ retval = -1;
+ }
+
+ pthread_mutex_unlock(&sem->lock);
+
+ return retval;
+}
+
+static int
+sem_post(sem_t *sem)
+{
+ pthread_mutex_lock(&sem->lock);
+
+ sem->count++;
+ if (sem->nwaiters > 0) {
+ pthread_cond_broadcast(&sem->gtzero);
+ }
+
+ pthread_mutex_unlock(&sem->lock);
+
+ return 0;
+}
+
+static int
+sem_getvalue(sem_t *sem, int *sval)
+{
+
+ pthread_mutex_lock(&sem->lock);
+ *sval = sem->count;
+ pthread_mutex_unlock(&sem->lock);
+
+ return 0;
+}
+#endif
+
+
#include <debug.h>
#include <string.h>
@@ -186,10 +330,12 @@ public:
Thread_impl(Thread *thread) : thread(thread) {
}
void setPriority(int priority) {
+#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
struct sched_param sp;
sp.sched_priority = priority;
if (pthread_setschedparam(pthread, SCHED_FIFO, &sp))
arts_debug("Thread::setPriority: sched_setscheduler failed");
+#endif
}
static pthread_key_t privateDataKey;
static void *threadStartInternal(void *impl)
|
