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>
16 #include <mono/utils/mono-mutex.h>
17 #include <mono/utils/mono-tls.h>
25 typedef DWORD MonoNativeThreadId;
26 typedef HANDLE MonoNativeThreadHandle; /* unused */
28 typedef DWORD mono_native_thread_return_t;
30 #define MONO_NATIVE_THREAD_ID_TO_UINT(tid) (tid)
31 #define MONO_UINT_TO_NATIVE_THREAD_ID(tid) ((MonoNativeThreadId)(tid))
38 #include <mono/utils/mach-support.h>
40 typedef thread_port_t MonoNativeThreadHandle;
46 typedef pid_t MonoNativeThreadHandle;
48 #endif /* defined(__MACH__) */
50 typedef pthread_t MonoNativeThreadId;
52 typedef void* mono_native_thread_return_t;
54 #define MONO_NATIVE_THREAD_ID_TO_UINT(tid) (gsize)(tid)
55 #define MONO_UINT_TO_NATIVE_THREAD_ID(tid) (MonoNativeThreadId)(gsize)(tid)
57 #endif /* #ifdef HOST_WIN32 */
60 THREAD_INFO_TYPE is a way to make the mono-threads module parametric - or sort of.
61 The GC using mono-threads might extend the MonoThreadInfo struct to add its own
62 data, this avoid a pointer indirection on what is on a lot of hot paths.
64 But extending MonoThreadInfo has de disavantage that all functions here return type
65 would require a cast, something like the following:
73 ((MyThreadInfo*)mono_thread_info_current ())->stuff = 1;
75 While porting sgen to use mono-threads, the number of casts required was too much and
76 code ended up looking horrible. So we use this cute little hack. The idea is that
77 whomever is including this header can set the expected type to be used by functions here
78 and reduce the number of casts drastically.
81 #ifndef THREAD_INFO_TYPE
82 #define THREAD_INFO_TYPE MonoThreadInfo
86 STATE_STARTING = 0x00,
88 STATE_SHUTTING_DOWN = 0x02,
90 RUN_STATE_MASK = 0x0F,
92 STATE_SUSPENDED = 0x10,
93 STATE_SELF_SUSPENDED = 0x20,
94 SUSPEND_STATE_MASK = 0xF0,
97 #define mono_thread_info_run_state(info) (((MonoThreadInfo*)info)->thread_state & RUN_STATE_MASK)
98 #define mono_thread_info_suspend_state(info) (((MonoThreadInfo*)info)->thread_state & SUSPEND_STATE_MASK)
101 MonoLinkedListSetNode node;
102 guint32 small_id; /*Used by hazard pointers */
103 MonoNativeThreadHandle native_handle; /* Valid on mach and android */
106 /*Tells if this thread was created by the runtime or not.*/
107 gboolean runtime_thread;
109 /* suspend machinery, fields protected by suspend_semaphore */
110 MonoSemType suspend_semaphore;
113 MonoSemType finish_resume_semaphore;
114 MonoSemType resume_semaphore;
116 /* only needed by the posix backend */
117 #if (defined(_POSIX_VERSION) || defined(__native_client__)) && !defined (__MACH__)
118 MonoSemType begin_suspend_semaphore;
119 gboolean syscall_break_signal;
120 gboolean suspend_can_continue;
123 /*In theory, only the posix backend needs this, but having it on mach/win32 simplifies things a lot.*/
124 MonoThreadUnwindState suspend_state;
126 /*async call machinery, thread MUST be suspended before accessing those fields*/
127 void (*async_target)(void*);
131 If true, this thread is running a critical region of code and cannot be suspended.
132 A critical session is implicitly started when you call mono_thread_info_safe_suspend_sync
133 and is ended when you call either mono_thread_info_resume or mono_thread_info_finish_suspend.
135 gboolean inside_critical_region;
138 * If TRUE, the thread is in async context. Code can use this information to avoid async-unsafe
139 * operations like locking without having to pass an 'async' parameter around.
141 gboolean is_async_context;
143 gboolean create_suspended;
145 /* Semaphore used to implement CREATE_SUSPENDED */
146 MonoSemType create_suspended_sem;
149 * Values of TLS variables for this thread.
150 * This can be used to obtain the values of TLS variable for threads
151 * other than the current one.
153 gpointer tls [TLS_KEY_NUM];
155 /* IO layer handle for this thread */
156 /* Set when the thread is started, or in _wapi_thread_duplicate () */
161 void* (*thread_register)(THREAD_INFO_TYPE *info, void *baseaddr);
163 This callback is called with @info still on the thread list.
164 This call is made while holding the suspend lock, so don't do callbacks.
165 SMR remains functional as its small_id has not been reclaimed.
167 void (*thread_unregister)(THREAD_INFO_TYPE *info);
169 This callback is called right before thread_unregister. This is called
170 without any locks held so it's the place for complicated cleanup.
172 The thread must remain operational between this call and thread_unregister.
173 It must be possible to successfully suspend it after thread_unregister completes.
175 void (*thread_detach)(THREAD_INFO_TYPE *info);
176 void (*thread_attach)(THREAD_INFO_TYPE *info);
177 gboolean (*mono_method_is_critical) (void *method);
178 void (*thread_exit)(void *retval);
180 int (*mono_gc_pthread_create) (pthread_t *new_thread, const pthread_attr_t *attr, void *(*start_routine)(void *), void *arg);
182 } MonoThreadInfoCallbacks;
185 void (*setup_async_callback) (MonoContext *ctx, void (*async_cb)(void *fun), gpointer user_data);
186 gboolean (*thread_state_init_from_sigctx) (MonoThreadUnwindState *state, void *sigctx);
187 gboolean (*thread_state_init_from_handle) (MonoThreadUnwindState *tctx, MonoThreadInfo *info);
188 } MonoThreadInfoRuntimeCallbacks;
191 Requires the world to be stoped
193 #define FOREACH_THREAD(thread) MONO_LLS_FOREACH (mono_thread_info_list_head (), thread, THREAD_INFO_TYPE*)
194 #define END_FOREACH_THREAD MONO_LLS_END_FOREACH
199 #define FOREACH_THREAD_SAFE(thread) MONO_LLS_FOREACH_SAFE (mono_thread_info_list_head (), thread, THREAD_INFO_TYPE*)
200 #define END_FOREACH_THREAD_SAFE MONO_LLS_END_FOREACH_SAFE
202 #define mono_thread_info_get_tid(info) ((MonoNativeThreadId)((MonoThreadInfo*)info)->node.key)
203 #define mono_thread_info_set_tid(info, val) do { ((MonoThreadInfo*)(info))->node.key = (uintptr_t)(val); } while (0)
206 * @thread_info_size is sizeof (GcThreadInfo), a struct the GC defines to make it possible to have
207 * a single block with info from both camps.
210 mono_threads_init (MonoThreadInfoCallbacks *callbacks, size_t thread_info_size) MONO_INTERNAL;
213 mono_threads_runtime_init (MonoThreadInfoRuntimeCallbacks *callbacks) MONO_INTERNAL;
215 MonoThreadInfoCallbacks *
216 mono_threads_get_callbacks (void) MONO_INTERNAL;
218 MonoThreadInfoRuntimeCallbacks *
219 mono_threads_get_runtime_callbacks (void) MONO_INTERNAL;
222 mono_thread_info_register_small_id (void) MONO_INTERNAL;
225 mono_thread_info_attach (void *baseptr) MONO_INTERNAL;
228 mono_thread_info_detach (void) MONO_INTERNAL;
231 mono_thread_info_is_exiting (void) MONO_INTERNAL;
234 mono_thread_info_current (void) MONO_INTERNAL;
237 mono_thread_info_get_small_id (void) MONO_INTERNAL;
240 mono_thread_info_list_head (void) MONO_INTERNAL;
243 mono_thread_info_lookup (MonoNativeThreadId id) MONO_INTERNAL;
246 mono_thread_info_safe_suspend_sync (MonoNativeThreadId tid, gboolean interrupt_kernel) MONO_INTERNAL;
249 mono_thread_info_resume (MonoNativeThreadId tid) MONO_INTERNAL;
252 mono_thread_info_set_name (MonoNativeThreadId tid, const char *name) MONO_INTERNAL;
255 mono_thread_info_finish_suspend (MonoThreadInfo *info) MONO_INTERNAL;
258 mono_thread_info_finish_suspend_and_resume (MonoThreadInfo *info) MONO_INTERNAL;
261 mono_thread_info_self_suspend (void) MONO_INTERNAL;
264 mono_thread_info_new_interrupt_enabled (void) MONO_INTERNAL;
267 mono_thread_info_setup_async_call (THREAD_INFO_TYPE *info, void (*target_func)(void*), void *user_data) MONO_INTERNAL;
270 mono_thread_info_suspend_lock (void) MONO_INTERNAL;
273 mono_thread_info_suspend_unlock (void) MONO_INTERNAL;
276 mono_thread_info_disable_new_interrupt (gboolean disable) MONO_INTERNAL;
279 mono_thread_info_abort_socket_syscall_for_close (MonoNativeThreadId tid) MONO_INTERNAL;
282 mono_thread_info_set_is_async_context (gboolean async_context) MONO_INTERNAL;
285 mono_thread_info_is_async_context (void) MONO_INTERNAL;
288 mono_thread_info_get_stack_bounds (guint8 **staddr, size_t *stsize);
291 mono_thread_info_yield (void) MONO_INTERNAL;
294 mono_thread_info_tls_get (THREAD_INFO_TYPE *info, MonoTlsKey key);
297 mono_thread_info_tls_set (THREAD_INFO_TYPE *info, MonoTlsKey key, gpointer value);
300 mono_thread_info_exit (void);
303 mono_thread_info_open_handle (void);
306 mono_thread_info_prepare_interrupt (HANDLE thread_handle);
309 mono_thread_info_finish_interrupt (gpointer wait_handle);
312 mono_thread_info_interrupt (HANDLE thread_handle);
315 mono_thread_info_self_interrupt (void);
318 mono_thread_info_clear_interruption (void);
321 mono_threads_create_thread (LPTHREAD_START_ROUTINE start, gpointer arg, guint32 stack_size, guint32 creation_flags, MonoNativeThreadId *out_tid);
324 mono_threads_get_max_stack_size (void) MONO_INTERNAL;
327 mono_threads_open_thread_handle (HANDLE handle, MonoNativeThreadId tid) MONO_INTERNAL;
329 #if !defined(HOST_WIN32)
331 #if !defined(__MACH__)
332 /*Use this instead of pthread_kill */
334 mono_threads_pthread_kill (THREAD_INFO_TYPE *info, int signum) MONO_INTERNAL;
337 #endif /* !defined(HOST_WIN32) */
339 /* Plartform specific functions DON'T use them */
340 void mono_threads_init_platform (void) MONO_INTERNAL; //ok
341 gboolean mono_threads_core_suspend (THREAD_INFO_TYPE *info) MONO_INTERNAL;
342 gboolean mono_threads_core_resume (THREAD_INFO_TYPE *info) MONO_INTERNAL;
343 void mono_threads_platform_register (THREAD_INFO_TYPE *info) MONO_INTERNAL; //ok
344 void mono_threads_platform_free (THREAD_INFO_TYPE *info) MONO_INTERNAL;
345 void mono_threads_core_interrupt (THREAD_INFO_TYPE *info) MONO_INTERNAL;
346 void mono_threads_core_abort_syscall (THREAD_INFO_TYPE *info) MONO_INTERNAL;
347 gboolean mono_threads_core_needs_abort_syscall (void) MONO_INTERNAL;
348 HANDLE mono_threads_core_create_thread (LPTHREAD_START_ROUTINE start, gpointer arg, guint32 stack_size, guint32 creation_flags, MonoNativeThreadId *out_tid) MONO_INTERNAL;
349 void mono_threads_core_resume_created (THREAD_INFO_TYPE *info, MonoNativeThreadId tid) MONO_INTERNAL;
350 void mono_threads_core_get_stack_bounds (guint8 **staddr, size_t *stsize) MONO_INTERNAL;
351 gboolean mono_threads_core_yield (void) MONO_INTERNAL;
352 void mono_threads_core_exit (int exit_code) MONO_INTERNAL;
353 void mono_threads_core_unregister (THREAD_INFO_TYPE *info) MONO_INTERNAL;
354 HANDLE mono_threads_core_open_handle (void) MONO_INTERNAL;
355 HANDLE mono_threads_core_open_thread_handle (HANDLE handle, MonoNativeThreadId tid) MONO_INTERNAL;
356 void mono_threads_core_set_name (MonoNativeThreadId tid, const char *name) MONO_INTERNAL;
357 gpointer mono_threads_core_prepare_interrupt (HANDLE thread_handle);
358 void mono_threads_core_finish_interrupt (gpointer wait_handle);
359 void mono_threads_core_self_interrupt (void);
360 void mono_threads_core_clear_interruption (void);
362 MonoNativeThreadId mono_native_thread_id_get (void) MONO_INTERNAL;
364 gboolean mono_native_thread_id_equals (MonoNativeThreadId id1, MonoNativeThreadId id2) MONO_INTERNAL;
367 mono_native_thread_create (MonoNativeThreadId *tid, gpointer func, gpointer arg) MONO_INTERNAL;
369 /*Mach specific internals */
370 void mono_threads_init_dead_letter (void) MONO_INTERNAL;
371 void mono_threads_install_dead_letter (void) MONO_INTERNAL;
373 #endif /* __MONO_THREADS_H__ */