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