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 #include "mono-threads-api.h"
  18
  19 G_BEGIN_DECLS
  20
  21 /* JIT specific interface */
  22 extern volatile size_t mono_polling_required;
  23
  24 /* Runtime consumable API */
  25
  26 static gboolean G_GNUC_UNUSED
  27 mono_threads_is_coop_enabled (void)
  28 {
  29 #if defined(USE_COOP_GC)
  30         return TRUE;
  31 #else
  32         static gboolean is_coop_enabled = -1;
  33         if (G_UNLIKELY (is_coop_enabled == -1))
  34                 is_coop_enabled = g_getenv ("MONO_ENABLE_COOP") != NULL ? TRUE : FALSE;
  35         return is_coop_enabled;
  36 #endif
  37 }
  38
  39 /* Internal API */
  40
  41 void
  42 mono_threads_state_poll (void);
  43
  44 static inline void
  45 mono_threads_safepoint (void)
  46 {
  47         if (G_UNLIKELY (mono_polling_required))
  48                 mono_threads_state_poll ();
  49 }
  50
  51 /*
  52  * The following are used for wrappers and trampolines as their
  53  * calls might be unbalanced, due to exception unwinding.
  54  */
  55
  56 gpointer
  57 mono_threads_enter_gc_safe_region_unbalanced (gpointer *stackdata);
  58
  59 void
  60 mono_threads_exit_gc_safe_region_unbalanced (gpointer cookie, gpointer *stackdata);
  61
  62 gpointer
  63 mono_threads_enter_gc_unsafe_region_unbalanced (gpointer *stackdata);
  64
  65 void
  66 mono_threads_exit_gc_unsafe_region_unbalanced (gpointer cookie, gpointer *stackdata);
  67
  68 #define MONO_ENTER_GC_UNSAFE_UNBALANCED \
  69         do {    \
  70                 gpointer __dummy;       \
  71                 gpointer __reset_cookie = mono_threads_enter_gc_unsafe_region_unbalanced (&__dummy)
  72
  73 #define MONO_EXIT_GC_UNSAFE_UNBALANCED  \
  74                 mono_threads_exit_gc_unsafe_region_unbalanced (__reset_cookie, &__dummy);       \
  75         } while (0)
  76
  77 G_END_DECLS
  78
  79 #endif