mono/utils/mono-threads-coop.h

   1 /*
   2  * mono-threads-coop.h: Cooperative suspend thread helpers
   3  *
   4  * Author:
   5  *      Rodrigo Kumpera (kumpera@gmail.com)
   6  *
   7  * (C) 2015 Xamarin
   8  */
   9
  10 #ifndef __MONO_THREADS_COOP_H__
  11 #define __MONO_THREADS_COOP_H__
  12
  13 #include <config.h>
  14 #include <glib.h>
  15
  16 /* JIT specific interface */
  17 extern volatile size_t mono_polling_required;
  18
  19 /* Runtime consumable API */
  20
  21 static gboolean G_GNUC_UNUSED
  22 mono_threads_is_coop_enabled (void)
  23 {
  24 #if defined(USE_COOP_GC)
  25         return TRUE;
  26 #else
  27         static gboolean is_coop_enabled = -1;
  28         if (G_UNLIKELY (is_coop_enabled == -1))
  29                 is_coop_enabled = g_getenv ("MONO_ENABLE_COOP") != NULL ? TRUE : FALSE;
  30         return is_coop_enabled;
  31 #endif
  32 }
  33
  34 /* Internal API */
  35
  36 void mono_threads_state_poll (void);
  37 void mono_threads_state_poll_stack_data (void* stackdata);
  38
  39 void* mono_threads_prepare_blocking (void* stackdata);
  40 void mono_threads_finish_blocking (void* cookie, void* stackdata);
  41
  42 void* mono_threads_reset_blocking_start (void* stackdata);
  43 void mono_threads_reset_blocking_end (void* cookie, void* stackdata);
  44
  45 static inline void
  46 mono_threads_safepoint (void)
  47 {
  48         if (G_UNLIKELY (mono_polling_required))
  49                 mono_threads_state_poll ();
  50 }
  51
  52 #define MONO_PREPARE_BLOCKING   \
  53         do {    \
  54                 void *__dummy;  \
  55                 void *__blocking_cookie = mono_threads_prepare_blocking (&__dummy)
  56
  57 #define MONO_FINISH_BLOCKING \
  58                 mono_threads_finish_blocking (__blocking_cookie, &__dummy);     \
  59         } while (0)
  60
  61 #define MONO_PREPARE_RESET_BLOCKING     \
  62         do {    \
  63                 void *__dummy;  \
  64                 void *__reset_cookie = mono_threads_reset_blocking_start (&__dummy)
  65
  66 #define MONO_FINISH_RESET_BLOCKING \
  67                 mono_threads_reset_blocking_end (__reset_cookie, &__dummy);     \
  68         } while (0)
  69
  70 #endif