add cairo

1 files changed, 424 insertions, 0 deletions

diff --git a/libs/cairo-1.16.0/src/cairo-atomic-private.h b/libs/cairo-1.16.0/src/cairo-atomic-private.h
new file mode 100644
index 0000000..4676185
--- /dev/null
+++ b/libs/cairo-1.16.0/src/cairo-atomic-private.h
@@ -0,0 +1,424 @@
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2007 Chris Wilson
+ * Copyright © 2010 Andrea Canciani
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ *
+ * The Original Code is the cairo graphics library.
+ *
+ * The Initial Developer of the Original Code is University of Southern
+ * California.
+ *
+ * Contributor(s):
+ *	Chris Wilson <chris@chris-wilson.co.uk>
+ *	Andrea Canciani <ranma42@gmail.com>
+ */
+
+#ifndef CAIRO_ATOMIC_PRIVATE_H
+#define CAIRO_ATOMIC_PRIVATE_H
+
+# include "cairo-compiler-private.h"
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <assert.h>
+
+/* 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_GCC_LEGACY_ATOMICS
+
+#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)
+{
+    __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;
+}
+
+# define _cairo_atomic_int_inc(x) ((void) __sync_fetch_and_add(x, 1))
+# define _cairo_atomic_int_dec(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(x) ((void) AO_fetch_and_sub1_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(x) ((void) OSAtomicDecrement32Barrier (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);
+
+#define _cairo_atomic_int_dec(x) _cairo_atomic_int_dec_and_test(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 { \
+    int ret__; \
+    assert (err < CAIRO_STATUS_LAST_STATUS); \
+    /* hide compiler warnings about cairo_status_t != int (gcc treats its as \
+     * an unsigned integer instead, and about ignoring the return value. */  \
+    ret__ = _cairo_atomic_int_cmpxchg ((cairo_atomic_int_t *) status, CAIRO_STATUS_SUCCESS, err); \
+    (void) ret__; \
+} while (0)
+
+typedef cairo_atomic_int_t cairo_atomic_once_t;
+
+#define CAIRO_ATOMIC_ONCE_UNINITIALIZED (0)
+#define CAIRO_ATOMIC_ONCE_INITIALIZING  (1)
+#define CAIRO_ATOMIC_ONCE_INITIALIZED   (2)
+#define CAIRO_ATOMIC_ONCE_INIT          CAIRO_ATOMIC_ONCE_UNINITIALIZED
+
+static cairo_always_inline cairo_bool_t
+_cairo_atomic_init_once_enter(cairo_atomic_once_t *once)
+{
+    if (likely(_cairo_atomic_int_get(once) == CAIRO_ATOMIC_ONCE_INITIALIZED))
+	return 0;
+
+    if (_cairo_atomic_int_cmpxchg(once,
+				  CAIRO_ATOMIC_ONCE_UNINITIALIZED,
+				  CAIRO_ATOMIC_ONCE_INITIALIZING))
+	return 1;
+
+    while (_cairo_atomic_int_get(once) != CAIRO_ATOMIC_ONCE_INITIALIZED) {}
+    return 0;
+}
+
+static cairo_always_inline void
+_cairo_atomic_init_once_leave(cairo_atomic_once_t *once)
+{
+    if (unlikely(!_cairo_atomic_int_cmpxchg(once,
+					    CAIRO_ATOMIC_ONCE_INITIALIZING,
+					    CAIRO_ATOMIC_ONCE_INITIALIZED)))
+	assert (0 && "incorrect use of _cairo_atomic_init_once API (once != CAIRO_ATOMIC_ONCE_INITIALIZING)");
+}
+
+CAIRO_END_DECLS
+
+#endif