mono/metadata/monitor.h

   1 /*
   2  * monitor.h: Monitor locking functions
   3  *
   4  * Author:
   5  *      Dick Porter (dick@ximian.com)
   6  *
   7  * (C) 2003 Ximian, Inc
   8  */
   9
  10 #ifndef _MONO_METADATA_MONITOR_H_
  11 #define _MONO_METADATA_MONITOR_H_
  12
  13 #include <glib.h>
  14 #include <mono/metadata/object.h>
  15 #include <mono/io-layer/io-layer.h>
  16 #include "mono/utils/mono-compiler.h"
  17
  18 G_BEGIN_DECLS
  19
  20 #define OWNER_MASK              0x0000ffff
  21 #define ENTRY_COUNT_MASK        0xffff0000
  22 #define ENTRY_COUNT_WAITERS     0x80000000
  23 #define ENTRY_COUNT_ZERO        0x7fff0000
  24 #define ENTRY_COUNT_SHIFT       16
  25
  26 struct _MonoThreadsSync
  27 {
  28         /*
  29          * The entry count field can be negative, which would mean that the entry_sem is
  30          * signaled and nobody is waiting to acquire it. This can happen when the thread
  31          * that was waiting is either interrupted or timeouts, and the owner releases
  32          * the lock before the forementioned thread updates the entry count.
  33          *
  34          * The 0 entry_count value is encoded as ENTRY_COUNT_ZERO, positive numbers being
  35          * greater than it and negative numbers smaller than it.
  36          */
  37         guint32 status;                 /* entry_count (16) | owner_id (16) */
  38         guint32 nest;
  39 #ifdef HAVE_MOVING_COLLECTOR
  40         gint32 hash_code;
  41 #endif
  42         HANDLE entry_sem;
  43         GSList *wait_list;
  44         void *data;
  45 };
  46
  47
  48 MONO_API void mono_locks_dump (gboolean include_untaken);
  49
  50 void mono_monitor_init (void) MONO_INTERNAL;
  51 void mono_monitor_cleanup (void) MONO_INTERNAL;
  52
  53 void** mono_monitor_get_object_monitor_weak_link (MonoObject *object) MONO_INTERNAL;
  54
  55 void mono_monitor_threads_sync_members_offset (int *status_offset, int *nest_offset) MONO_INTERNAL;
  56 #define MONO_THREADS_SYNC_MEMBER_OFFSET(o)      ((o)>>8)
  57 #define MONO_THREADS_SYNC_MEMBER_SIZE(o)        ((o)&0xff)
  58
  59 extern gboolean ves_icall_System_Threading_Monitor_Monitor_try_enter(MonoObject *obj, guint32 ms) MONO_INTERNAL;
  60 extern gboolean ves_icall_System_Threading_Monitor_Monitor_test_owner(MonoObject *obj) MONO_INTERNAL;
  61 extern gboolean ves_icall_System_Threading_Monitor_Monitor_test_synchronised(MonoObject *obj) MONO_INTERNAL;
  62 extern void ves_icall_System_Threading_Monitor_Monitor_pulse(MonoObject *obj) MONO_INTERNAL;
  63 extern void ves_icall_System_Threading_Monitor_Monitor_pulse_all(MonoObject *obj) MONO_INTERNAL;
  64 extern gboolean ves_icall_System_Threading_Monitor_Monitor_wait(MonoObject *obj, guint32 ms) MONO_INTERNAL;
  65 extern void ves_icall_System_Threading_Monitor_Monitor_try_enter_with_atomic_var (MonoObject *obj, guint32 ms, char *lockTaken) MONO_INTERNAL;
  66
  67 G_END_DECLS
  68
  69 #endif /* _MONO_METADATA_MONITOR_H_ */