mono/utils/mono-threads-mach.c

   1 /*
   2  * mono-threads-mach.c: Low-level threading, mach version
   3  *
   4  * Author:
   5  *      Rodrigo Kumpera (kumpera@gmail.com)
   6  *
   7  * (C) 2011 Novell, Inc
   8  */
   9
  10 #include "config.h"
  11
  12 #if defined(__MACH__)
  13
  14 #include <mono/utils/mach-support.h>
  15 #include <mono/utils/mono-compiler.h>
  16 #include <mono/utils/mono-semaphore.h>
  17 #include <mono/utils/mono-threads.h>
  18 #include <mono/utils/hazard-pointer.h>
  19 #include <mono/metadata/gc-internal.h>
  20 #include <mono/metadata/appdomain.h>
  21 #include <mono/metadata/threads-types.h>
  22
  23 #include <pthread.h>
  24 #include <errno.h>
  25
  26 void
  27 mono_threads_init_platform (void)
  28 {
  29         mono_threads_init_dead_letter ();
  30 }
  31
  32 void
  33 mono_threads_core_interrupt (MonoThreadInfo *info)
  34 {
  35         thread_abort (info->native_handle);
  36 }
  37
  38 void
  39 mono_threads_core_abort_syscall (MonoThreadInfo *info)
  40 {
  41 }
  42
  43 gboolean
  44 mono_threads_core_needs_abort_syscall (void)
  45 {
  46         return FALSE;
  47 }
  48
  49 gboolean
  50 mono_threads_core_suspend (MonoThreadInfo *info)
  51 {
  52         kern_return_t ret;
  53         gboolean res;
  54
  55         g_assert (info);
  56
  57         ret = thread_suspend (info->native_handle);
  58         if (ret != KERN_SUCCESS)
  59                 return FALSE;
  60         res = mono_threads_get_runtime_callbacks ()->
  61                 thread_state_init_from_handle (&info->suspend_state, info);
  62         if (!res)
  63                 thread_resume (info->native_handle);
  64         return res;
  65 }
  66
  67 gboolean
  68 mono_threads_core_resume (MonoThreadInfo *info)
  69 {
  70         kern_return_t ret;
  71
  72         if (info->async_target) {
  73                 MonoContext tmp = info->suspend_state.ctx;
  74                 mach_msg_type_number_t num_state;
  75                 thread_state_t state;
  76                 ucontext_t uctx;
  77                 mcontext_t mctx;
  78
  79                 mono_threads_get_runtime_callbacks ()->setup_async_callback (&tmp, info->async_target, info->user_data);
  80                 info->async_target = info->user_data = NULL;
  81
  82                 state = (thread_state_t) alloca (mono_mach_arch_get_thread_state_size ());
  83                 mctx = (mcontext_t) alloca (mono_mach_arch_get_mcontext_size ());
  84
  85                 ret = mono_mach_arch_get_thread_state (info->native_handle, state, &num_state);
  86                 if (ret != KERN_SUCCESS)
  87                         return FALSE;
  88
  89                 mono_mach_arch_thread_state_to_mcontext (state, mctx);
  90 #ifdef TARGET_ARM64
  91                 g_assert_not_reached ();
  92 #else
  93                 uctx.uc_mcontext = mctx;
  94 #endif
  95                 mono_monoctx_to_sigctx (&tmp, &uctx);
  96
  97                 mono_mach_arch_mcontext_to_thread_state (mctx, state);
  98
  99                 ret = mono_mach_arch_set_thread_state (info->native_handle, state, num_state);
 100                 if (ret != KERN_SUCCESS)
 101                         return FALSE;
 102         }
 103
 104
 105         ret = thread_resume (info->native_handle);
 106         return ret == KERN_SUCCESS;
 107 }
 108
 109 void
 110 mono_threads_platform_register (MonoThreadInfo *info)
 111 {
 112         info->native_handle = mach_thread_self ();
 113         mono_threads_install_dead_letter ();
 114 }
 115
 116 void
 117 mono_threads_platform_free (MonoThreadInfo *info)
 118 {
 119         mach_port_deallocate (current_task (), info->native_handle);
 120 }
 121
 122 MonoNativeThreadId
 123 mono_native_thread_id_get (void)
 124 {
 125         return pthread_self ();
 126 }
 127
 128 gboolean
 129 mono_native_thread_id_equals (MonoNativeThreadId id1, MonoNativeThreadId id2)
 130 {
 131         return pthread_equal (id1, id2);
 132 }
 133
 134 /*
 135  * mono_native_thread_create:
 136  *
 137  *   Low level thread creation function without any GC wrappers.
 138  */
 139 gboolean
 140 mono_native_thread_create (MonoNativeThreadId *tid, gpointer func, gpointer arg)
 141 {
 142         return pthread_create (tid, NULL, func, arg) == 0;
 143 }
 144
 145 void
 146 mono_threads_core_set_name (MonoNativeThreadId tid, const char *name)
 147 {
 148         /* pthread_setnmae_np() on Mac is not documented and doesn't receive thread id. */
 149 }
 150
 151 #endif