2 * mono-threads.h: Low-level threading
5 * Rodrigo Kumpera (kumpera@gmail.com)
10 #ifndef __MONO_THREADS_H__
11 #define __MONO_THREADS_H__
13 #include <mono/utils/mono-semaphore.h>
14 #include <mono/utils/mono-stack-unwinding.h>
15 #include <mono/utils/mono-linked-list-set.h>
17 /* FIXME used for CRITICAL_SECTION replace with mono-mutex */
18 #include <mono/io-layer/io-layer.h>
26 typedef DWORD MonoNativeThreadId;
27 typedef HANDLE MonoNativeThreadHandle; /* unused */
29 typedef DWORD mono_native_thread_return_t;
36 #include <mono/utils/mach-support.h>
38 typedef thread_port_t MonoNativeThreadHandle;
44 typedef pid_t MonoNativeThreadHandle;
46 #endif /* defined(__MACH__) */
48 typedef pthread_t MonoNativeThreadId;
50 typedef void* mono_native_thread_return_t;
52 #endif /* #ifdef HOST_WIN32 */
55 THREAD_INFO_TYPE is a way to make the mono-threads module parametric - or sort of.
56 The GC using mono-threads might extend the MonoThreadInfo struct to add its own
57 data, this avoid a pointer indirection on what is on a lot of hot paths.
59 But extending MonoThreadInfo has de disavantage that all functions here return type
60 would require a cast, something like the following:
68 ((MyThreadInfo*)mono_thread_info_current ())->stuff = 1;
70 While porting sgen to use mono-threads, the number of casts required was too much and
71 code ended up looking horrible. So we use this cute little hack. The idea is that
72 whomever is including this header can set the expected type to be used by functions here
73 and reduce the number of casts drastically.
76 #ifndef THREAD_INFO_TYPE
77 #define THREAD_INFO_TYPE MonoThreadInfo
81 STATE_STARTING = 0x01,
83 STATE_SHUTTING_DOWN = 0x03,
85 RUN_STATE_MASK = 0x0F,
87 STATE_SUSPENDED = 0x10,
88 STATE_SELF_SUSPENDED = 0x20,
89 SUSPEND_STATE_MASK = 0xF0,
92 #define mono_thread_info_run_state(info) ((info)->thread_state & RUN_STATE_MASK)
93 #define mono_thread_info_suspend_state(info) ((info)->thread_state & SUSPEND_STATE_MASK)
96 MonoLinkedListSetNode node;
97 guint32 small_id; /*Used by hazard pointers */
98 MonoNativeThreadHandle native_handle; /* Valid on mach and android */
101 /* suspend machinery, fields protected by the suspend_lock */
102 CRITICAL_SECTION suspend_lock;
105 MonoSemType finish_resume_semaphore;
106 MonoSemType resume_semaphore;
108 /* only needed by the posix backend */
109 #if (defined(_POSIX_VERSION) || defined(__native_client__)) && !defined (__MACH__)
110 MonoSemType suspend_semaphore;
111 gboolean syscall_break_signal;
112 gboolean suspend_can_continue;
115 /*In theory, only the posix backend needs this, but having it on mach/win32 simplifies things a lot.*/
116 MonoThreadUnwindState suspend_state;
118 /*async call machinery, thread MUST be suspended before accessing those fields*/
119 void (*async_target)(void*);
124 void* (*thread_register)(THREAD_INFO_TYPE *info, void *baseaddr);
126 This callback is called after @info is removed from the thread list.
127 SMR remains functional as its small_id has not been reclaimed.
129 void (*thread_unregister)(THREAD_INFO_TYPE *info);
130 void (*thread_attach)(THREAD_INFO_TYPE *info);
131 gboolean (*mono_method_is_critical) (void *method);
133 int (*mono_gc_pthread_create) (pthread_t *new_thread, const pthread_attr_t *attr, void *(*start_routine)(void *), void *arg);
135 } MonoThreadInfoCallbacks;
138 void (*setup_async_callback) (MonoContext *ctx, void (*async_cb)(void *fun), gpointer user_data);
139 gboolean (*thread_state_init_from_sigctx) (MonoThreadUnwindState *state, void *sigctx);
140 gboolean (*thread_state_init_from_handle) (MonoThreadUnwindState *tctx, MonoNativeThreadId thread_id, MonoNativeThreadHandle thread_handle);
141 } MonoThreadInfoRuntimeCallbacks;
144 Requires the world to be stoped
146 #define FOREACH_THREAD(thread) MONO_LLS_FOREACH (mono_thread_info_list_head (), thread, SgenThreadInfo*)
147 #define END_FOREACH_THREAD MONO_LLS_END_FOREACH
152 #define FOREACH_THREAD_SAFE(thread) MONO_LLS_FOREACH_SAFE (mono_thread_info_list_head (), thread, SgenThreadInfo*)
153 #define END_FOREACH_THREAD_SAFE MONO_LLS_END_FOREACH_SAFE
155 #define mono_thread_info_get_tid(info) ((MonoNativeThreadId)((MonoThreadInfo*)info)->node.key)
156 #define mono_thread_info_set_tid(info, val) do { ((MonoThreadInfo*)(info))->node.key = (uintptr_t)(val); } while (0)
159 * @thread_info_size is sizeof (GcThreadInfo), a struct the GC defines to make it possible to have
160 * a single block with info from both camps.
163 mono_threads_init (MonoThreadInfoCallbacks *callbacks, size_t thread_info_size) MONO_INTERNAL;
166 mono_threads_runtime_init (MonoThreadInfoRuntimeCallbacks *callbacks) MONO_INTERNAL;
168 MonoThreadInfoCallbacks *
169 mono_threads_get_callbacks (void) MONO_INTERNAL;
171 MonoThreadInfoRuntimeCallbacks *
172 mono_threads_get_runtime_callbacks (void) MONO_INTERNAL;
175 mono_thread_info_register_small_id (void) MONO_INTERNAL;
178 mono_thread_info_attach (void *baseptr) MONO_INTERNAL;
181 mono_thread_info_dettach (void) MONO_INTERNAL;
184 mono_thread_info_current (void) MONO_INTERNAL;
187 mono_thread_info_get_small_id (void) MONO_INTERNAL;
190 mono_thread_info_list_head (void) MONO_INTERNAL;
193 mono_thread_info_lookup (MonoNativeThreadId id) MONO_INTERNAL;
196 mono_thread_info_safe_suspend_sync (MonoNativeThreadId tid, gboolean interrupt_kernel) MONO_INTERNAL;
199 mono_thread_info_resume (MonoNativeThreadId tid) MONO_INTERNAL;
202 mono_thread_info_self_suspend (void) MONO_INTERNAL;
205 mono_thread_info_new_interrupt_enabled (void) MONO_INTERNAL;
208 mono_thread_info_setup_async_call (MonoThreadInfo *info, void (*target_func)(void*), void *user_data) MONO_INTERNAL;
211 mono_thread_info_suspend_lock (void) MONO_INTERNAL;
214 mono_thread_info_suspend_unlock (void) MONO_INTERNAL;
217 mono_threads_unregister_current_thread (THREAD_INFO_TYPE *info) MONO_INTERNAL;
220 mono_thread_info_disable_new_interrupt (gboolean disable) MONO_INTERNAL;
223 mono_thread_info_abort_socket_syscall_for_close (MonoNativeThreadId tid) MONO_INTERNAL;
225 #if !defined(HOST_WIN32)
228 mono_threads_pthread_create (pthread_t *new_thread, const pthread_attr_t *attr, void *(*start_routine)(void *), void *arg) MONO_INTERNAL;
230 #if !defined(__MACH__)
231 /*Use this instead of pthread_kill */
233 mono_threads_pthread_kill (THREAD_INFO_TYPE *info, int signum) MONO_INTERNAL;
236 #else /* !defined(HOST_WIN32) */
239 mono_threads_CreateThread (LPSECURITY_ATTRIBUTES attributes, SIZE_T stack_size, LPTHREAD_START_ROUTINE start_routine, LPVOID arg, DWORD creation_flags, LPDWORD thread_id);
242 #endif /* !defined(HOST_WIN32) */
244 /* Plartform specific functions DON'T use them */
245 void mono_threads_init_platform (void) MONO_INTERNAL; //ok
246 gboolean mono_threads_core_suspend (MonoThreadInfo *info) MONO_INTERNAL;
247 gboolean mono_threads_core_resume (MonoThreadInfo *info) MONO_INTERNAL;
248 void mono_threads_platform_register (MonoThreadInfo *info) MONO_INTERNAL; //ok
249 void mono_threads_platform_free (MonoThreadInfo *info) MONO_INTERNAL;
250 void mono_threads_core_interrupt (MonoThreadInfo *info) MONO_INTERNAL;
251 void mono_threads_core_abort_syscall (MonoThreadInfo *info) MONO_INTERNAL;
252 gboolean mono_threads_core_needs_abort_syscall (void) MONO_INTERNAL;
254 MonoNativeThreadId mono_native_thread_id_get (void) MONO_INTERNAL;
256 gboolean mono_native_thread_id_equals (MonoNativeThreadId id1, MonoNativeThreadId id2) MONO_INTERNAL;
259 mono_native_thread_create (MonoNativeThreadId *tid, gpointer func, gpointer arg) MONO_INTERNAL;
261 #endif /* __MONO_THREADS_H__ */