Libc-1439.100.3.tar.gz

[apple/libc.git] / sys / OSMemoryNotification.c

diff --git a/sys/OSMemoryNotification.c b/sys/OSMemoryNotification.c
index 897b9ac33e20435742b5421e99d80b7a992c1e16..9e94e4ee70c82462958c28cc38bd4ccb20b9b50c 100644 (file)
--- a/sys/OSMemoryNotification.c
+++ b/sys/OSMemoryNotification.c
@@ -21,115 +21,11 @@
  * @APPLE_LICENSE_HEADER_END@
  */
 
-#include <errno.h>
-#include <libkern/OSMemoryNotification.h>
-#include <mach/mach.h>
-#include <notify.h>
-#include <stdlib.h>
-#include <sys/time.h>
-#include <dispatch/dispatch.h>
-#include <dispatch/private.h>
+// Legacy symbols preserved for binary compatibility.
 
 const char *kOSMemoryNotificationName = "com.apple.system.memorystatus";
 
-struct _OSMemoryNotification {
-       int token;
-       mach_port_t port;
-};
-
-int
-OSMemoryNotificationCreate(OSMemoryNotificationRef *note)
-{
-       OSMemoryNotificationRef ref = malloc(sizeof(struct _OSMemoryNotification));
-
-       if (NULL == ref) {
-               return ENOMEM;
-       }
-       
-       if (NOTIFY_STATUS_OK != notify_register_mach_port(kOSMemoryNotificationName, &ref->port, 0, &ref->token))
-               return ENOMEM;
-
-       *note = ref;
-
-       return 0;
-}
-
-int
-OSMemoryNotificationDestroy(OSMemoryNotificationRef note)
-{
-       if (NOTIFY_STATUS_OK != notify_cancel(note->token))
-               return EINVAL;
-
-       if (KERN_SUCCESS != mach_port_deallocate(mach_task_self(), note->port))
-               return EINVAL;
-
-       free(note);
-
-       return 0;
-}
-               
-int
-OSMemoryNotificationWait(OSMemoryNotificationRef note, OSMemoryNotificationLevel *level)
-{
-       return OSMemoryNotificationTimedWait(note, level, NULL);
-}
-
-static mach_msg_timeout_t
-abs_to_timeout(const struct timeval *abstime)
-{
-       struct timeval rel, now;
-
-       gettimeofday(&now, NULL);
-
-       rel.tv_usec = abstime->tv_usec - now.tv_usec;
-       rel.tv_sec = abstime->tv_sec - now.tv_sec;
-       if (rel.tv_usec < 0) {
-               rel.tv_usec += 1000000;
-               rel.tv_sec--;
-       }
-       if (((int)rel.tv_sec < 0) || ((rel.tv_sec == 0) && (rel.tv_usec == 0))) {
-               return 0;
-       }
-       return rel.tv_sec * 1000 + rel.tv_usec / 1000;
-}
-
-int
-OSMemoryNotificationTimedWait(OSMemoryNotificationRef note, OSMemoryNotificationLevel *level, const struct timeval *abstime)
-{
-    dispatch_semaphore_t sema = dispatch_semaphore_create(0);
-    dispatch_retain(sema);
-    
-    dispatch_source_t memoryNotificationSource = dispatch_source_create(DISPATCH_SOURCE_TYPE_VM, 0, DISPATCH_VM_PRESSURE, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0));
-    dispatch_source_set_event_handler(memoryNotificationSource, ^{
-        dispatch_semaphore_signal(sema);
-        dispatch_release(sema);
-    });
-
-    dispatch_resume(memoryNotificationSource);
-    
-    dispatch_time_t waitTime = DISPATCH_TIME_FOREVER;
-    if (abstime) {
-        mach_msg_timeout_t timeout = abs_to_timeout(abstime);
-        waitTime = dispatch_time(DISPATCH_TIME_NOW, timeout * 1e6);
-    }
-    
-    long ret = dispatch_semaphore_wait(sema, waitTime);
-
-    dispatch_release(sema);
-    dispatch_release(memoryNotificationSource);
-
-    if (ret != 0) {
-        return ETIMEDOUT;
-    }
-    
-    if (level) {
-        *level = OSMemoryNotificationLevelUrgent;
-    }
-    
-    return 0;
-}
-
-OSMemoryNotificationLevel OSMemoryNotificationCurrentLevel(void)
+int OSMemoryNotificationCurrentLevel(void)
 {
-       return OSMemoryNotificationLevelNormal;
+       return 0; // OSMemoryNotificationLevelNormal
 }