harfbuzz-ng roll

third_party/harfbuzz-ng/src/hb-atomic-private.hh

 /*
  * Copyright © 2007  Chris Wilson
  * Copyright © 2009,2010  Red Hat, Inc.
  * Copyright © 2011,2012  Google, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
  * Permission is hereby granted, without written agreement and without
  * license or royalty fees, to use, copy, modify, and distribute this
  * software and its documentation for any purpose, provided that the
@@ skipping 24 matching lines @@
 #include "hb-private.hh"
 
 
 /* atomic_int */
 
 /* We need external help for these */
 
 #if 0
 
 
-#elif !defined(HB_NO_MT) && defined(_MSC_VER) && _MSC_VER >= 1600
+#elif !defined(HB_NO_MT) && defined(_MSC_VER) || defined(__MINGW32__)
 
-#include <intrin.h>
-#pragma intrinsic(_InterlockedExchangeAdd, _InterlockedCompareExchangePointer)
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+/* mingw32 does not have MemoryBarrier.
+ * MemoryBarrier may be defined as a macro or a function.
+ * Just make a failsafe version for ourselves. */
+#ifdef MemoryBarrier
+#define HBMemoryBarrier MemoryBarrier
+#else
+static inline void HBMemoryBarrier (void) {
+  long dummy = 0;
+  InterlockedExchange (&dummy, 1);
+}
+#endif
 
 typedef long hb_atomic_int_t;
-#define hb_atomic_int_add(AI, V)        _InterlockedExchangeAdd (&(AI), (V))
+#define hb_atomic_int_add(AI, V)        InterlockedExchangeAdd (&(AI), (V))
 
-#define hb_atomic_ptr_get(P)            (MemoryBarrier (), (void *) *(P))
-#define hb_atomic_ptr_cmpexch(P,O,N)    (_InterlockedCompareExchangePointer ((void **) (P), (void *) (N), (void *) (O)) == (void *) (O))
+#define hb_atomic_ptr_get(P)            (HBMemoryBarrier (), (void *) *(P))
+#define hb_atomic_ptr_cmpexch(P,O,N)    (InterlockedCompareExchangePointer ((void **) (P), (void *) (N), (void *) (O)) == (void *) (O))
 
 
 #elif !defined(HB_NO_MT) && defined(__APPLE__)
 
 #include <libkern/OSAtomic.h>
 
 typedef int32_t hb_atomic_int_t;
 #define hb_atomic_int_add(AI, V)        (OSAtomicAdd32Barrier ((V), &(AI)) - (V))
 
 #define hb_atomic_ptr_get(P)            (OSMemoryBarrier (), (void *) *(P))
 #define hb_atomic_ptr_cmpexch(P,O,N)    OSAtomicCompareAndSwapPtrBarrier ((void *) (O), (void *) (N), (void **) (P))
 
 
-#elif !defined(HB_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES) && !defined(__MINGW32__)
+#elif !defined(HB_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES)
 
 typedef int hb_atomic_int_t;
 #define hb_atomic_int_add(AI, V)        __sync_fetch_and_add (&(AI), (V))
 
 #define hb_atomic_ptr_get(P)            (void *) (__sync_synchronize (), *(P))
 #define hb_atomic_ptr_cmpexch(P,O,N)    __sync_bool_compare_and_swap ((P), (O), (N))
 
 #elif !defined(HB_NO_MT) && defined(HAVE_GLIB)
 
 #include <glib.h>
@@ skipping 24 matching lines @@
 #define hb_atomic_int_add(AI, V)        (((AI) += (V)) - (V))
 
 #define hb_atomic_ptr_get(P)            ((void *) *(P))
 #define hb_atomic_ptr_cmpexch(P,O,N)    (* (void **) (P) == (void *) (O) ? (* (void **) (P) = (void *) (N), true) : false)
 
 #endif
 
 /* TODO Add tracing. */
 
 #endif /* HB_ATOMIC_PRIVATE_HH */