1 files changed, 385 insertions, 0 deletions
diff --git a/libs/cairo/src/cairo-atomic-private.h b/libs/cairo/src/cairo-atomic-private.h
new file mode 100644
index 000000000..e14c5fdaf
--- /dev/null
+++ b/libs/cairo/src/cairo-atomic-private.h
@@ -0,0 +1,385 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef CAIRO_ATOMIC_PRIVATE_H
+#define CAIRO_ATOMIC_PRIVATE_H
+
+# include "cairo-compiler-private.h"
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#if HAVE_WIN32_ATOMIC_PRIMITIVES
+#include <Windows.h>
+#endif
+
+/* The autoconf on OpenBSD 4.5 produces the malformed constant name
+ * SIZEOF_VOID__ rather than SIZEOF_VOID_P.  Work around that here. */
+#if !defined(SIZEOF_VOID_P) && defined(SIZEOF_VOID__)
+# define SIZEOF_VOID_P SIZEOF_VOID__
+#endif
+
+CAIRO_BEGIN_DECLS
+
+/* C++11 atomic primitives were designed to be more flexible than the
+ * __sync_* family of primitives.  Despite the name, they are available
+ * in C as well as C++.  The motivating reason for using them is that
+ * for _cairo_atomic_{int,ptr}_get, the compiler is able to see that
+ * the load is intended to be atomic, as opposed to the __sync_*
+ * version, below, where the load looks like a plain load.  Having
+ * the load appear atomic to the compiler is particular important for
+ * tools like ThreadSanitizer so they don't report false positives on
+ * memory operations that we intend to be atomic.
+ */
+#if HAVE_CXX11_ATOMIC_PRIMITIVES
+
+#define HAS_ATOMIC_OPS 1
+
+typedef int cairo_atomic_int_t;
+
+static cairo_always_inline cairo_atomic_int_t
+_cairo_atomic_int_get (cairo_atomic_int_t *x)
+{
+    return __atomic_load_n(x, __ATOMIC_SEQ_CST);
+}
+
+static cairo_always_inline cairo_atomic_int_t
+_cairo_atomic_int_get_relaxed (cairo_atomic_int_t *x)
+{
+    return __atomic_load_n(x, __ATOMIC_RELAXED);
+}
+
+static cairo_always_inline void
+_cairo_atomic_int_set_relaxed (cairo_atomic_int_t *x, cairo_atomic_int_t val)
+{
+    __atomic_store_n(x, val, __ATOMIC_RELAXED);
+}
+
+static cairo_always_inline void *
+_cairo_atomic_ptr_get (void **x)
+{
+    return __atomic_load_n(x, __ATOMIC_SEQ_CST);
+}
+
+# define _cairo_atomic_int_inc(x) ((void) __atomic_fetch_add(x, 1, __ATOMIC_SEQ_CST))
+# define _cairo_atomic_int_dec(x) ((void) __atomic_fetch_sub(x, 1, __ATOMIC_SEQ_CST))
+# define _cairo_atomic_int_dec_and_test(x) (__atomic_fetch_sub(x, 1, __ATOMIC_SEQ_CST) == 1)
+
+#if SIZEOF_VOID_P==SIZEOF_INT
+typedef int cairo_atomic_intptr_t;
+#elif SIZEOF_VOID_P==SIZEOF_LONG
+typedef long cairo_atomic_intptr_t;
+#elif SIZEOF_VOID_P==SIZEOF_LONG_LONG
+typedef long long cairo_atomic_intptr_t;
+#else
+#error No matching integer pointer type
+#endif
+
+static cairo_always_inline cairo_bool_t
+_cairo_atomic_int_cmpxchg_impl(cairo_atomic_int_t *x,
+			       cairo_atomic_int_t oldv,
+			       cairo_atomic_int_t newv)
+{
+    cairo_atomic_int_t expected = oldv;
+    return __atomic_compare_exchange_n(x, &expected, newv, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
+}
+
+#define _cairo_atomic_int_cmpxchg(x, oldv, newv) \
+  _cairo_atomic_int_cmpxchg_impl(x, oldv, newv)
+
+static cairo_always_inline cairo_atomic_int_t
+_cairo_atomic_int_cmpxchg_return_old_impl(cairo_atomic_int_t *x,
+					  cairo_atomic_int_t oldv,
+					  cairo_atomic_int_t newv)
+{
+    cairo_atomic_int_t expected = oldv;
+    (void) __atomic_compare_exchange_n(x, &expected, newv, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
+    return expected;
+}
+
+#define _cairo_atomic_int_cmpxchg_return_old(x, oldv, newv) \
+  _cairo_atomic_int_cmpxchg_return_old_impl(x, oldv, newv)
+
+static cairo_always_inline cairo_bool_t
+_cairo_atomic_ptr_cmpxchg_impl(void **x, void *oldv, void *newv)
+{
+    void *expected = oldv;
+    return __atomic_compare_exchange_n(x, &expected, newv, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
+}
+
+#define _cairo_atomic_ptr_cmpxchg(x, oldv, newv) \
+  _cairo_atomic_ptr_cmpxchg_impl(x, oldv, newv)
+
+static cairo_always_inline void *
+_cairo_atomic_ptr_cmpxchg_return_old_impl(void **x, void *oldv, void *newv)
+{
+    void *expected = oldv;
+    (void) __atomic_compare_exchange_n(x, &expected, newv, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
+    return expected;
+}
+
+#define _cairo_atomic_ptr_cmpxchg_return_old(x, oldv, newv) \
+  _cairo_atomic_ptr_cmpxchg_return_old_impl(x, oldv, newv)
+
+#endif
+
+#if HAVE_WIN32_ATOMIC_PRIMITIVES
+
+#define HAS_ATOMIC_OPS 1
+
+typedef volatile long cairo_atomic_int_t;
+
+# define _cairo_atomic_int_get(x) ((int)*x)
+# define _cairo_atomic_int_get_relaxed(x) ((int)*(x))
+# define _cairo_atomic_int_set_relaxed(x, val) (*(x) = (val))
+# define _cairo_atomic_ptr_get(x) ((void*)*x)
+
+# define _cairo_atomic_int_inc(x) ((void) InterlockedIncrement(x))
+# define _cairo_atomic_int_dec(x) ((void) InterlockedDecrement(x))
+# define _cairo_atomic_int_dec_and_test(x) (InterlockedDecrement(x) == 0)
+# define _cairo_atomic_int_cmpxchg(x, oldv, newv) (InterlockedCompareExchange(x, newv, oldv) == oldv)
+# define _cairo_atomic_int_cmpxchg_return_old(x, oldv, newv) InterlockedCompareExchange(x, newv, oldv)
+
+typedef volatile void* cairo_atomic_intptr_t;
+
+#define _cairo_atomic_ptr_cmpxchg(x, oldv, newv) (InterlockedCompareExchangePointer(x, newv, oldv) == oldv)
+#define _cairo_atomic_ptr_cmpxchg_return_old(x, oldv, newv) (InterlockedCompareExchangePointer(x, newv, oldv))
+
+#endif
+
+#if HAVE_INTEL_ATOMIC_PRIMITIVES
+
+#define HAS_ATOMIC_OPS 1
+
+typedef int cairo_atomic_int_t;
+
+#ifdef ATOMIC_OP_NEEDS_MEMORY_BARRIER
+static cairo_always_inline cairo_atomic_int_t
+_cairo_atomic_int_get (cairo_atomic_int_t *x)
+{
+    __sync_synchronize ();
+    return *x;
+}
+
+static cairo_always_inline cairo_atomic_int_t
+_cairo_atomic_int_get_relaxed (cairo_atomic_int_t *x)
+{
+    return *x;
+}
+
+static cairo_always_inline void
+_cairo_atomic_int_set_relaxed (cairo_atomic_int_t *x, cairo_atomic_int_t val)
+{
+    *x = val;
+}
+
+static cairo_always_inline void *
+_cairo_atomic_ptr_get (void **x)
+{
+    __sync_synchronize ();
+    return *x;
+}
+#else
+# define _cairo_atomic_int_get(x) (*x)
+# define _cairo_atomic_int_get_relaxed(x) (*(x))
+# define _cairo_atomic_int_set_relaxed(x, val) (*(x) = (val))
+# define _cairo_atomic_ptr_get(x) (*x)
+#endif
+
+# define _cairo_atomic_int_inc(x) ((void) __sync_fetch_and_add(x, 1))
+# define _cairo_atomic_int_dec_and_test(x) (__sync_fetch_and_add(x, -1) == 1)
+# define _cairo_atomic_int_cmpxchg(x, oldv, newv) __sync_bool_compare_and_swap (x, oldv, newv)
+# define _cairo_atomic_int_cmpxchg_return_old(x, oldv, newv) __sync_val_compare_and_swap (x, oldv, newv)
+
+#if SIZEOF_VOID_P==SIZEOF_INT
+typedef int cairo_atomic_intptr_t;
+#elif SIZEOF_VOID_P==SIZEOF_LONG
+typedef long cairo_atomic_intptr_t;
+#elif SIZEOF_VOID_P==SIZEOF_LONG_LONG
+typedef long long cairo_atomic_intptr_t;
+#else
+#error No matching integer pointer type
+#endif
+
+# define _cairo_atomic_ptr_cmpxchg(x, oldv, newv) \
+    __sync_bool_compare_and_swap ((cairo_atomic_intptr_t*)x, (cairo_atomic_intptr_t)oldv, (cairo_atomic_intptr_t)newv)
+
+# define _cairo_atomic_ptr_cmpxchg_return_old(x, oldv, newv) \
+    _cairo_atomic_intptr_to_voidptr (__sync_val_compare_and_swap ((cairo_atomic_intptr_t*)x, (cairo_atomic_intptr_t)oldv, (cairo_atomic_intptr_t)newv))
+
+#endif
+
+#if HAVE_LIB_ATOMIC_OPS
+#include <atomic_ops.h>
+
+#define HAS_ATOMIC_OPS 1
+
+typedef  AO_t cairo_atomic_int_t;
+
+# define _cairo_atomic_int_get(x) (AO_load_full (x))
+# define _cairo_atomic_int_get_relaxed(x) (AO_load_full (x))
+# define _cairo_atomic_int_set_relaxed(x, val) (AO_store_full ((x), (val)))
+
+# define _cairo_atomic_int_inc(x) ((void) AO_fetch_and_add1_full(x))
+# define _cairo_atomic_int_dec_and_test(x) (AO_fetch_and_sub1_full(x) == 1)
+# define _cairo_atomic_int_cmpxchg(x, oldv, newv) AO_compare_and_swap_full(x, oldv, newv)
+
+#if SIZEOF_VOID_P==SIZEOF_INT
+typedef unsigned int cairo_atomic_intptr_t;
+#elif SIZEOF_VOID_P==SIZEOF_LONG
+typedef unsigned long cairo_atomic_intptr_t;
+#elif SIZEOF_VOID_P==SIZEOF_LONG_LONG
+typedef unsigned long long cairo_atomic_intptr_t;
+#else
+#error No matching integer pointer type
+#endif
+
+# define _cairo_atomic_ptr_get(x) _cairo_atomic_intptr_to_voidptr (AO_load_full (x))
+# define _cairo_atomic_ptr_cmpxchg(x, oldv, newv) \
+    _cairo_atomic_int_cmpxchg ((cairo_atomic_intptr_t*)(x), (cairo_atomic_intptr_t)oldv, (cairo_atomic_intptr_t)newv)
+
+#endif
+
+#if HAVE_OS_ATOMIC_OPS
+#include <libkern/OSAtomic.h>
+
+#define HAS_ATOMIC_OPS 1
+
+typedef int32_t cairo_atomic_int_t;
+
+# define _cairo_atomic_int_get(x) (OSMemoryBarrier(), *(x))
+# define _cairo_atomic_int_get_relaxed(x) (*(x))
+# define _cairo_atomic_int_set_relaxed(x, val) (*(x) = (val))
+
+# define _cairo_atomic_int_inc(x) ((void) OSAtomicIncrement32Barrier (x))
+# define _cairo_atomic_int_dec_and_test(x) (OSAtomicDecrement32Barrier (x) == 0)
+# define _cairo_atomic_int_cmpxchg(x, oldv, newv) OSAtomicCompareAndSwap32Barrier(oldv, newv, x)
+
+#if SIZEOF_VOID_P==4
+typedef int32_t cairo_atomic_intptr_t;
+# define _cairo_atomic_ptr_cmpxchg(x, oldv, newv) \
+    OSAtomicCompareAndSwap32Barrier((cairo_atomic_intptr_t)oldv, (cairo_atomic_intptr_t)newv, (cairo_atomic_intptr_t *)x)
+
+#elif SIZEOF_VOID_P==8
+typedef int64_t cairo_atomic_intptr_t;
+# define _cairo_atomic_ptr_cmpxchg(x, oldv, newv) \
+    OSAtomicCompareAndSwap64Barrier((cairo_atomic_intptr_t)oldv, (cairo_atomic_intptr_t)newv, (cairo_atomic_intptr_t *)x)
+
+#else
+#error No matching integer pointer type
+#endif
+
+# define _cairo_atomic_ptr_get(x) (OSMemoryBarrier(), *(x))
+
+#endif
+
+#ifndef HAS_ATOMIC_OPS
+
+#if SIZEOF_VOID_P==SIZEOF_INT
+typedef unsigned int cairo_atomic_intptr_t;
+#elif SIZEOF_VOID_P==SIZEOF_LONG
+typedef unsigned long cairo_atomic_intptr_t;
+#elif SIZEOF_VOID_P==SIZEOF_LONG_LONG
+typedef unsigned long long cairo_atomic_intptr_t;
+#else
+#error No matching integer pointer type
+#endif
+
+typedef cairo_atomic_intptr_t cairo_atomic_int_t;
+
+cairo_private void
+_cairo_atomic_int_inc (cairo_atomic_int_t *x);
+
+cairo_private cairo_bool_t
+_cairo_atomic_int_dec_and_test (cairo_atomic_int_t *x);
+
+cairo_private cairo_atomic_int_t
+_cairo_atomic_int_cmpxchg_return_old_impl (cairo_atomic_int_t *x, cairo_atomic_int_t oldv, cairo_atomic_int_t newv);
+
+cairo_private void *
+_cairo_atomic_ptr_cmpxchg_return_old_impl (void **x, void *oldv, void *newv);
+
+#define _cairo_atomic_int_cmpxchg_return_old(x, oldv, newv) _cairo_atomic_int_cmpxchg_return_old_impl (x, oldv, newv)
+#define _cairo_atomic_ptr_cmpxchg_return_old(x, oldv, newv) _cairo_atomic_ptr_cmpxchg_return_old_impl (x, oldv, newv)
+
+#ifdef ATOMIC_OP_NEEDS_MEMORY_BARRIER
+cairo_private cairo_atomic_int_t
+_cairo_atomic_int_get (cairo_atomic_int_t *x);
+cairo_private cairo_atomic_int_t
+_cairo_atomic_int_get_relaxed (cairo_atomic_int_t *x);
+void
+_cairo_atomic_int_set_relaxed (cairo_atomic_int_t *x, cairo_atomic_int_t val);
+# define _cairo_atomic_ptr_get(x) (void *) _cairo_atomic_int_get((cairo_atomic_int_t *) x)
+#else
+# define _cairo_atomic_int_get(x) (*x)
+# define _cairo_atomic_int_get_relaxed(x) (*(x))
+# define _cairo_atomic_int_set_relaxed(x, val) (*(x) = (val))
+# define _cairo_atomic_ptr_get(x) (*x)
+#endif
+
+#else
+
+/* Workaround GCC complaining about casts */
+static cairo_always_inline void *
+_cairo_atomic_intptr_to_voidptr (cairo_atomic_intptr_t x)
+{
+  return (void *) x;
+}
+
+static cairo_always_inline cairo_atomic_int_t
+_cairo_atomic_int_cmpxchg_return_old_fallback(cairo_atomic_int_t *x, cairo_atomic_int_t oldv, cairo_atomic_int_t newv)
+{
+    cairo_atomic_int_t curr;
+
+    do {
+        curr = _cairo_atomic_int_get (x);
+    } while (curr == oldv && !_cairo_atomic_int_cmpxchg (x, oldv, newv));
+
+    return curr;
+}
+
+static cairo_always_inline void *
+_cairo_atomic_ptr_cmpxchg_return_old_fallback(void **x, void *oldv, void *newv)
+{
+    void *curr;
+
+    do {
+        curr = _cairo_atomic_ptr_get (x);
+    } while (curr == oldv && !_cairo_atomic_ptr_cmpxchg (x, oldv, newv));
+
+    return curr;
+}
+#endif
+
+#ifndef _cairo_atomic_int_cmpxchg_return_old
+#define _cairo_atomic_int_cmpxchg_return_old(x, oldv, newv) _cairo_atomic_int_cmpxchg_return_old_fallback (x, oldv, newv)
+#endif
+
+#ifndef _cairo_atomic_ptr_cmpxchg_return_old
+#define _cairo_atomic_ptr_cmpxchg_return_old(x, oldv, newv) _cairo_atomic_ptr_cmpxchg_return_old_fallback (x, oldv, newv)
+#endif
+
+#ifndef _cairo_atomic_int_cmpxchg
+#define _cairo_atomic_int_cmpxchg(x, oldv, newv) (_cairo_atomic_int_cmpxchg_return_old (x, oldv, newv) == oldv)
+#endif
+
+#ifndef _cairo_atomic_ptr_cmpxchg
+#define _cairo_atomic_ptr_cmpxchg(x, oldv, newv) (_cairo_atomic_ptr_cmpxchg_return_old (x, oldv, newv) == oldv)
+#endif
+
+#define _cairo_atomic_uint_get(x) _cairo_atomic_int_get(x)
+#define _cairo_atomic_uint_cmpxchg(x, oldv, newv) \
+    _cairo_atomic_int_cmpxchg((cairo_atomic_int_t *)x, oldv, newv)
+
+#define _cairo_status_set_error(status, err) do { \
+    /* hide compiler warnings about cairo_status_t != int (gcc treats its as \
+     * an unsigned integer instead, and about ignoring the return value. */  \
+    int ret__ = _cairo_atomic_int_cmpxchg ((cairo_atomic_int_t *) status, CAIRO_STATUS_SUCCESS, err); \
+    (void) ret__; \
+} while (0)
+
+CAIRO_END_DECLS
+
+#endif