From c36b559196727e2477c6007b063d861aea5ea703 Mon Sep 17 00:00:00 2001 From: Thiago Macieira Date: Tue, 10 Jul 2012 13:11:10 +0200 Subject: Import forkfd into qtbase forkfd is a tool that I designed to facilitate spawning sub-processes. It's implemented in C, not C++, so that it could be used by other libraries as well. To work in all platforms Qt supports and with all compilers Qt is known to work with, we'll need to replace the generic GCC atomics that are provided here. Change-Id: I0a6f86cc220a7c52c8d4284bb7140c56d5cf836a Reviewed-by: Rafael Roquetto Reviewed-by: Oswald Buddenhagen --- src/3rdparty/forkfd/forkfd_gcc.h | 76 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 src/3rdparty/forkfd/forkfd_gcc.h (limited to 'src/3rdparty/forkfd/forkfd_gcc.h') diff --git a/src/3rdparty/forkfd/forkfd_gcc.h b/src/3rdparty/forkfd/forkfd_gcc.h new file mode 100644 index 0000000000..e5cbbe60e0 --- /dev/null +++ b/src/3rdparty/forkfd/forkfd_gcc.h @@ -0,0 +1,76 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Intel Corporation +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef FFD_ATOMIC_GCC_H +#define FFD_ATOMIC_GCC_H + +/* atomics */ +/* we'll use the GCC 4.7 atomic builtins + * See http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html#_005f_005fatomic-Builtins + * Or in texinfo: C Extensions > __atomic Builtins + */ +typedef int ffd_atomic_int; +#define ffd_atomic_pointer(type) type* + +#define FFD_ATOMIC_INIT(val) (val) + +#define FFD_ATOMIC_RELAXED __ATOMIC_RELAXED +#define FFD_ATOMIC_ACQUIRE __ATOMIC_ACQUIRE +#define FFD_ATOMIC_RELEASE __ATOMIC_RELEASE +// acq_rel & cst not necessary + +#if !defined(__GNUC__) || \ + ((__GNUC__ - 0) * 100 + (__GNUC_MINOR__ - 0)) < 407 || \ + (defined(__INTEL_COMPILER) && __INTEL_COMPILER-0 < 1310) || \ + (defined(__clang__) && ((__clang_major__-0) * 100 + (__clang_minor-0)) < 303) +#define ffd_atomic_load_n(ptr,order) *(ptr) +#define ffd_atomic_store_n(ptr,val,order) (*(ptr) = (val), (void)0) +#define ffd_atomic_exchange_n(ptr,val,order) __sync_lock_test_and_set(ptr, val) +#define ffd_atomic_compare_exchange_n(ptr,expected,desired,weak,order1,order2) \ + __sync_bool_compare_and_swap(ptr, *(expected), desired) ? 1 : \ + (*(expected) = *(ptr), 0) +#define ffd_atomic_add_fetch(ptr,val,order) __sync_add_and_fetch(ptr, val) +#else +#define ffd_atomic_load(ptr,order) __atomic_load_n(ptr, order) +#define ffd_atomic_store(ptr,val,order) __atomic_store_n(ptr, val, order) +#define ffd_atomic_exchange(ptr,val,order) __atomic_exchange_n(ptr, val, order) +#define ffd_atomic_compare_exchange(ptr,expected,desired,order1,order2) \ + __atomic_compare_exchange_n(ptr, expected, desired, 1, order1, order2) +#define ffd_atomic_add_fetch(ptr,val,order) __atomic_add_fetch(ptr, val, order) +#endif + +#endif -- cgit v1.2.3