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 #include "checked-build.h"
  17
  18 G_BEGIN_DECLS
  19
  20 /* JIT specific interface */
  21 extern volatile size_t mono_polling_required;
  22
  23 /* Runtime consumable API */
  24
  25 static gboolean G_GNUC_UNUSED
  26 mono_threads_is_coop_enabled (void)
  27 {
  28 #if defined(USE_COOP_GC)
  29         return TRUE;
  30 #else
  31         static gboolean is_coop_enabled = -1;
  32         if (G_UNLIKELY (is_coop_enabled == -1))
  33                 is_coop_enabled = g_getenv ("MONO_ENABLE_COOP") != NULL ? TRUE : FALSE;
  34         return is_coop_enabled;
  35 #endif
  36 }
  37
  38 /* Internal API */
  39
  40 void
  41 mono_threads_state_poll (void);
  42
  43 gpointer
  44 mono_threads_prepare_blocking (gpointer stackdata);
  45
  46 void
  47 mono_threads_finish_blocking (gpointer cookie, gpointer stackdata);
  48
  49 gpointer
  50 mono_threads_reset_blocking_start (gpointer stackdata);
  51
  52 void
  53 mono_threads_reset_blocking_end (gpointer cookie, gpointer stackdata);
  54
  55 static inline void
  56 mono_threads_safepoint (void)
  57 {
  58         if (G_UNLIKELY (mono_polling_required))
  59                 mono_threads_state_poll ();
  60 }
  61
  62 #define MONO_PREPARE_BLOCKING   \
  63         MONO_REQ_GC_NOT_CRITICAL;               \
  64         do {    \
  65                 gpointer __dummy;       \
  66                 gpointer __blocking_cookie = mono_threads_prepare_blocking (&__dummy)
  67
  68 #define MONO_FINISH_BLOCKING \
  69                 mono_threads_finish_blocking (__blocking_cookie, &__dummy);     \
  70         } while (0)
  71
  72 #define MONO_PREPARE_RESET_BLOCKING     \
  73         do {    \
  74                 gpointer __dummy;       \
  75                 gpointer __reset_cookie = mono_threads_reset_blocking_start (&__dummy)
  76
  77 #define MONO_FINISH_RESET_BLOCKING \
  78                 mono_threads_reset_blocking_end (__reset_cookie, &__dummy);     \
  79         } while (0)
  80
  81 G_END_DECLS
  82
  83 #endif