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 }
  30
  31 void
  32 mono_threads_core_interrupt (MonoThreadInfo *info)
  33 {
  34         thread_abort_safely (info->native_handle);
  35 }
  36
  37 void
  38 mono_threads_core_self_suspend (MonoThreadInfo *info)
  39 {
  40         kern_return_t kern_ret;
  41         gboolean ret;
  42
  43         g_assert (info);
  44
  45         ret = mono_threads_get_runtime_callbacks ()->thread_state_init_from_sigctx (&info->suspend_state, NULL);
  46         g_assert (ret);
  47
  48         /* we must unlock only after context is captured. */
  49         LeaveCriticalSection (&info->suspend_lock);
  50
  51         kern_ret = thread_suspend (info->native_handle);
  52         g_assert (kern_ret == KERN_SUCCESS);
  53 }
  54
  55 gboolean
  56 mono_threads_core_suspend (MonoThreadInfo *info)
  57 {
  58         kern_return_t ret;
  59         g_assert (info);
  60
  61         ret = thread_suspend (info->native_handle);
  62         if (ret != KERN_SUCCESS)
  63                 return FALSE;
  64         return mono_threads_get_runtime_callbacks ()->
  65                 thread_state_init_from_handle (&info->suspend_state, mono_thread_info_get_tid (info), info->native_handle);
  66 }
  67
  68 gboolean
  69 mono_threads_core_resume (MonoThreadInfo *info)
  70 {
  71         kern_return_t ret;
  72
  73         if (info->async_target) {
  74                 MonoContext tmp = info->suspend_state.ctx;
  75                 mach_msg_type_number_t num_state;
  76                 thread_state_t state;
  77                 ucontext_t uctx;
  78                 mcontext_t mctx;
  79
  80                 mono_threads_get_runtime_callbacks ()->setup_async_callback (&tmp, info->async_target, info->user_data);
  81                 info->async_target = info->user_data = NULL;
  82
  83                 state = (thread_state_t) alloca (mono_mach_arch_get_thread_state_size ());
  84                 mctx = (mcontext_t) alloca (mono_mach_arch_get_mcontext_size ());
  85
  86                 ret = mono_mach_arch_get_thread_state (info->native_handle, state, &num_state);
  87                 if (ret != KERN_SUCCESS)
  88                         return FALSE;
  89
  90                 mono_mach_arch_thread_state_to_mcontext (state, mctx);
  91                 uctx.uc_mcontext = mctx;
  92                 mono_monoctx_to_sigctx (&tmp, &uctx);
  93
  94                 mono_mach_arch_mcontext_to_thread_state (mctx, state);
  95
  96                 ret = mono_mach_arch_set_thread_state (info->native_handle, state, num_state);
  97                 if (ret != KERN_SUCCESS)
  98                         return FALSE;
  99         }
 100
 101
 102         ret = thread_resume (info->native_handle);
 103         return ret == KERN_SUCCESS;
 104 }
 105
 106 void
 107 mono_threads_platform_register (MonoThreadInfo *info)
 108 {
 109         info->native_handle = mach_thread_self ();
 110 }
 111
 112 void
 113 mono_threads_platform_free (MonoThreadInfo *info)
 114 {
 115         mach_port_deallocate (current_task (), info->native_handle);
 116 }
 117
 118 #endif