2 * hazard-pointer.h: Hazard pointer related code.
4 * (C) Copyright 2011 Novell, Inc
5 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
7 #ifndef __MONO_HAZARD_POINTER_H__
8 #define __MONO_HAZARD_POINTER_H__
11 #include <mono/utils/mono-compiler.h>
12 #include <mono/utils/mono-membar.h>
14 #define HAZARD_POINTER_COUNT 3
17 gpointer hazard_pointers [HAZARD_POINTER_COUNT];
18 } MonoThreadHazardPointers;
20 typedef void (*MonoHazardousFreeFunc) (gpointer p);
29 HAZARD_FREE_ASYNC_CTX,
32 gboolean mono_thread_hazardous_try_free (gpointer p, MonoHazardousFreeFunc free_func);
33 void mono_thread_hazardous_queue_free (gpointer p, MonoHazardousFreeFunc free_func);
35 void mono_thread_hazardous_try_free_all (void);
36 void mono_thread_hazardous_try_free_some (void);
37 MonoThreadHazardPointers* mono_hazard_pointer_get (void);
38 gpointer get_hazardous_pointer (gpointer volatile *pp, MonoThreadHazardPointers *hp, int hazard_index);
40 #define mono_hazard_pointer_set(hp,i,v) \
41 do { g_assert ((i) >= 0 && (i) < HAZARD_POINTER_COUNT); \
42 (hp)->hazard_pointers [(i)] = (v); \
43 mono_memory_write_barrier (); \
46 #define mono_hazard_pointer_get_val(hp,i) \
47 ((hp)->hazard_pointers [(i)])
49 #define mono_hazard_pointer_clear(hp,i) \
50 do { g_assert ((i) >= 0 && (i) < HAZARD_POINTER_COUNT); \
51 mono_memory_write_barrier (); \
52 (hp)->hazard_pointers [(i)] = NULL; \
56 void mono_thread_small_id_free (int id);
57 int mono_thread_small_id_alloc (void);
59 int mono_hazard_pointer_save_for_signal_handler (void);
60 void mono_hazard_pointer_restore_for_signal_handler (int small_id);
62 typedef void (*MonoHazardFreeQueueSizeCallback)(size_t size);
63 void mono_hazard_pointer_install_free_queue_size_callback (MonoHazardFreeQueueSizeCallback cb);
65 void mono_thread_smr_init (void);
66 void mono_thread_smr_cleanup (void);
67 #endif /*__MONO_HAZARD_POINTER_H__*/