#include <signal.h>
#include <limits.h>
#include <mach-o/dyld.h>
+#include <stdio.h>
#include <errno.h>
#include <dlfcn.h>
return pid;
}
}
+#endif
void darwin_init(void)
{
+#ifdef LISP_FEATURE_MACH_EXCEPTION_HANDLER
setup_mach_exception_handling_thread();
+#endif
}
-#endif
+#ifdef LISP_FEATURE_SB_THREAD
+
+inline void
+os_sem_init(os_sem_t *sem, unsigned int value)
+{
+ if (KERN_SUCCESS!=semaphore_create(current_mach_task, sem, SYNC_POLICY_FIFO, (int)value))
+ lose("os_sem_init(%p): %s", sem, strerror(errno));
+}
+
+inline void
+os_sem_wait(os_sem_t *sem, char *what)
+{
+ kern_return_t ret;
+ restart:
+ FSHOW((stderr, "%s: os_sem_wait(%p)\n", what, sem));
+ ret = semaphore_wait(*sem);
+ FSHOW((stderr, "%s: os_sem_wait(%p) => %s\n", what, sem,
+ KERN_SUCCESS==ret ? "ok" : strerror(errno)));
+ switch (ret) {
+ case KERN_SUCCESS:
+ return;
+ /* It is unclear just when we can get this, but a sufficiently
+ * long wait seems to do that, at least sometimes.
+ *
+ * However, a wait that long is definitely abnormal for the
+ * GC, so we complain before retrying.
+ */
+ case KERN_OPERATION_TIMED_OUT:
+ fprintf(stderr, "%s: os_sem_wait(%p): %s", what, sem, strerror(errno));
+ /* This is analogous to POSIX EINTR. */
+ case KERN_ABORTED:
+ goto restart;
+ default:
+ lose("%s: os_sem_wait(%p): %lu, %s", what, sem, ret, strerror(errno));
+ }
+}
+
+void
+os_sem_post(os_sem_t *sem, char *what)
+{
+ if (KERN_SUCCESS!=semaphore_signal(*sem))
+ lose("%s: os_sem_post(%p): %s", what, sem, strerror(errno));
+ FSHOW((stderr, "%s: os_sem_post(%p) ok\n", what, sem));
+}
+
+void
+os_sem_destroy(os_sem_t *sem)
+{
+ if (-1==semaphore_destroy(current_mach_task, *sem))
+ lose("os_sem_destroy(%p): %s", sem, strerror(errno));
+}
+
+#endif