"Implement" OSSpecificSynchronizationContext icalls.

Author: TautvydasZilys

mono/metadata/icall-def.h

@@ -935,6 +935,10 @@ HANDLES(ICALL(NATIVEC_3, "OpenEvent_internal(string,System.Security.AccessContro
 ICALL(NATIVEC_4, "ResetEvent_internal",  ves_icall_System_Threading_Events_ResetEvent_internal)
 ICALL(NATIVEC_5, "SetEvent_internal",    ves_icall_System_Threading_Events_SetEvent_internal)
 
+ICALL_TYPE(OSSYNCCONTEXT, "System.Threading.OSSpecificSynchronizationContext", OSSYNCCONTEXT_1)
+HANDLES(ICALL(OSSYNCCONTEXT_1, "GetOSContext", ves_icall_System_Threading_OSSpecificSynchronizationContext_GetOSContext))
+ICALL(OSSYNCCONTEXT_2, "PostInternal", ves_icall_System_Threading_OSSpecificSynchronizationContext_PostInternal)
+
 ICALL_TYPE(SEMA, "System.Threading.Semaphore", SEMA_1)
 ICALL(SEMA_1, "CreateSemaphore_internal(int,int,string,int&)", ves_icall_System_Threading_Semaphore_CreateSemaphore_internal)
 ICALL(SEMA_2, "OpenSemaphore_internal(string,System.Security.AccessControl.SemaphoreRights,int&)", ves_icall_System_Threading_Semaphore_OpenSemaphore_internal)

mono/metadata/icall.c

@@ -8751,3 +8751,15 @@ mono_register_jit_icall (gconstpointer func, const char *name, MonoMethodSignatu
 	return mono_register_jit_icall_full (func, name, sig, no_wrapper, NULL);
 }
 
+MonoObjectHandle
+ves_icall_System_Threading_OSSpecificSynchronizationContext_GetOSContext ()
+{
+	return NULL_HANDLE;
+}
+
+void
+ves_icall_System_Threading_OSSpecificSynchronizationContext_PostInternal (gpointer callback, gpointer arg)
+{
+	/* This isn't actually reachable since ves_icall_System_Threading_OSSpecificSynchronizationContext_GetOSContext always returns NULL */
+	mono_set_pending_exception (mono_get_exception_not_implemented ("System.Threading.InteropServices.OSSpecificSynchronizationContext.PostInternal internal call is not implemented."));
+}

mono/metadata/threads-types.h

@@ -267,4 +267,10 @@ mono_thread_internal_describe (MonoInternalThread *internal, GString *str);
 gboolean
 mono_thread_internal_is_current (MonoInternalThread *internal);
 
+MonoObjectHandle
+ves_icall_System_Threading_OSSpecificSynchronizationContext_GetOSContext ();
+
+void
+ves_icall_System_Threading_OSSpecificSynchronizationContext_PostInternal (gpointer callback, gpointer arg);
+
 #endif /* _MONO_METADATA_THREADS_TYPES_H_ */