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;
114 /*In theory, only the posix backend needs this, but having it on mach/win32 simplifies things a lot.*/
115 MonoThreadUnwindState suspend_state;
117 /*async call machinery, thread MUST be suspended before accessing those fields*/
118 void (*async_target)(void*);
123 void* (*thread_register)(THREAD_INFO_TYPE *info, void *baseaddr);
125 This callback is called after @info is removed from the thread list.
126 SMR remains functional as its small_id has not been reclaimed.
128 void (*thread_unregister)(THREAD_INFO_TYPE *info);
129 void (*thread_attach)(THREAD_INFO_TYPE *info);
130 gboolean (*mono_method_is_critical) (void *method);
132 int (*mono_gc_pthread_create) (pthread_t *new_thread, const pthread_attr_t *attr, void *(*start_routine)(void *), void *arg);
134 } MonoThreadInfoCallbacks;
137 void (*setup_async_callback) (MonoContext *ctx, void (*async_cb)(void *fun), gpointer user_data);
138 gboolean (*thread_state_init_from_sigctx) (MonoThreadUnwindState *state, void *sigctx);
139 gboolean (*thread_state_init_from_handle) (MonoThreadUnwindState *tctx, MonoNativeThreadId thread_id, MonoNativeThreadHandle thread_handle);
140 } MonoThreadInfoRuntimeCallbacks;
143 Requires the world to be stoped
145 #define FOREACH_THREAD(thread) MONO_LLS_FOREACH (mono_thread_info_list_head (), thread, SgenThreadInfo*)
146 #define END_FOREACH_THREAD MONO_LLS_END_FOREACH
151 #define FOREACH_THREAD_SAFE(thread) MONO_LLS_FOREACH_SAFE (mono_thread_info_list_head (), thread, SgenThreadInfo*)
152 #define END_FOREACH_THREAD_SAFE MONO_LLS_END_FOREACH_SAFE
154 #define mono_thread_info_get_tid(info) ((MonoNativeThreadId)((MonoThreadInfo*)info)->node.key)
155 #define mono_thread_info_set_tid(info, val) do { ((MonoThreadInfo*)(info))->node.key = (uintptr_t)(val); } while (0)
158 * @thread_info_size is sizeof (GcThreadInfo), a struct the GC defines to make it possible to have
159 * a single block with info from both camps.
162 mono_threads_init (MonoThreadInfoCallbacks *callbacks, size_t thread_info_size) MONO_INTERNAL;
165 mono_threads_runtime_init (MonoThreadInfoRuntimeCallbacks *callbacks) MONO_INTERNAL;
167 MonoThreadInfoCallbacks *
168 mono_threads_get_callbacks (void) MONO_INTERNAL;
170 MonoThreadInfoRuntimeCallbacks *
171 mono_threads_get_runtime_callbacks (void) MONO_INTERNAL;
174 mono_thread_info_register_small_id (void) MONO_INTERNAL;
177 mono_thread_info_attach (void *baseptr) MONO_INTERNAL;
180 mono_thread_info_dettach (void) MONO_INTERNAL;
183 mono_thread_info_current (void) MONO_INTERNAL;
186 mono_thread_info_get_small_id (void) MONO_INTERNAL;
189 mono_thread_info_list_head (void) MONO_INTERNAL;
192 mono_thread_info_lookup (MonoNativeThreadId id) MONO_INTERNAL;
195 mono_thread_info_safe_suspend_sync (MonoNativeThreadId tid, gboolean interrupt_kernel) MONO_INTERNAL;
198 mono_thread_info_resume (MonoNativeThreadId tid) MONO_INTERNAL;
201 mono_thread_info_self_suspend (void) MONO_INTERNAL;
204 mono_thread_info_new_interrupt_enabled (void) MONO_INTERNAL;
207 mono_thread_info_setup_async_call (MonoThreadInfo *info, void (*target_func)(void*), void *user_data) MONO_INTERNAL;
210 mono_thread_info_suspend_lock (void) MONO_INTERNAL;
213 mono_thread_info_suspend_unlock (void) MONO_INTERNAL;
216 mono_threads_unregister_current_thread (THREAD_INFO_TYPE *info) MONO_INTERNAL;
219 mono_thread_info_disable_new_interrupt (gboolean disable) MONO_INTERNAL;
222 mono_thread_info_abort_socket_syscall_for_close (MonoNativeThreadId tid) MONO_INTERNAL;
224 #if !defined(HOST_WIN32)
227 mono_threads_pthread_create (pthread_t *new_thread, const pthread_attr_t *attr, void *(*start_routine)(void *), void *arg) MONO_INTERNAL;
229 #if !defined(__MACH__)
230 /*Use this instead of pthread_kill */
232 mono_threads_pthread_kill (THREAD_INFO_TYPE *info, int signum) MONO_INTERNAL;
235 #else /* !defined(HOST_WIN32) */
238 mono_threads_CreateThread (LPSECURITY_ATTRIBUTES attributes, SIZE_T stack_size, LPTHREAD_START_ROUTINE start_routine, LPVOID arg, DWORD creation_flags, LPDWORD thread_id);
241 #endif /* !defined(HOST_WIN32) */
243 /* Plartform specific functions DON'T use them */
244 void mono_threads_init_platform (void) MONO_INTERNAL; //ok
245 gboolean mono_threads_core_suspend (MonoThreadInfo *info) MONO_INTERNAL;
246 gboolean mono_threads_core_resume (MonoThreadInfo *info) MONO_INTERNAL;
247 void mono_threads_platform_register (MonoThreadInfo *info) MONO_INTERNAL; //ok
248 void mono_threads_platform_free (MonoThreadInfo *info) MONO_INTERNAL;
249 void mono_threads_core_interrupt (MonoThreadInfo *info) MONO_INTERNAL;
250 void mono_threads_core_abort_syscall (MonoThreadInfo *info) MONO_INTERNAL;
251 gboolean mono_threads_core_needs_abort_syscall (void) MONO_INTERNAL;
253 MonoNativeThreadId mono_native_thread_id_get (void) MONO_INTERNAL;
255 gboolean mono_native_thread_id_equals (MonoNativeThreadId id1, MonoNativeThreadId id2) MONO_INTERNAL;
258 mono_native_thread_create (MonoNativeThreadId *tid, gpointer func, gpointer arg) MONO_INTERNAL;
260 #endif /* __MONO_THREADS_H__ */