add macOS implementation
This commit is contained in:
Nick Fisher
263
macos/include/utils/compiler.h
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263
macos/include/utils/compiler.h
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/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef TNT_UTILS_COMPILER_H
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#define TNT_UTILS_COMPILER_H
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// compatibility with non-clang compilers...
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#ifndef __has_attribute
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#define __has_attribute(x) 0
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#endif
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#ifndef __has_feature
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#define __has_feature(x) 0
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#endif
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#ifndef __has_builtin
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#define __has_builtin(x) 0
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#endif
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#if __has_attribute(visibility)
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# define UTILS_PUBLIC __attribute__((visibility("default")))
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#else
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# define UTILS_PUBLIC
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#endif
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#if __has_attribute(deprecated)
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# define UTILS_DEPRECATED [[deprecated]]
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#else
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# define UTILS_DEPRECATED
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#endif
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#if __has_attribute(packed)
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# define UTILS_PACKED __attribute__((packed))
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#else
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# define UTILS_PACKED
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#endif
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#if __has_attribute(noreturn)
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# define UTILS_NORETURN __attribute__((noreturn))
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#else
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# define UTILS_NORETURN
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#endif
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#if __has_attribute(fallthrough)
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# define UTILS_FALLTHROUGH [[fallthrough]]
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#else
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# define UTILS_FALLTHROUGH
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#endif
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#if __has_attribute(visibility)
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# ifndef TNT_DEV
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# define UTILS_PRIVATE __attribute__((visibility("hidden")))
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# else
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# define UTILS_PRIVATE
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# endif
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#else
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# define UTILS_PRIVATE
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#endif
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#define UTILS_NO_SANITIZE_THREAD
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#if __has_feature(thread_sanitizer)
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#undef UTILS_NO_SANITIZE_THREAD
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#define UTILS_NO_SANITIZE_THREAD __attribute__((no_sanitize("thread")))
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#endif
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#define UTILS_HAS_SANITIZE_THREAD 0
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#if __has_feature(thread_sanitizer) || defined(__SANITIZE_THREAD__)
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#undef UTILS_HAS_SANITIZE_THREAD
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#define UTILS_HAS_SANITIZE_THREAD 1
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#endif
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#define UTILS_HAS_SANITIZE_MEMORY 0
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#if __has_feature(memory_sanitizer)
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#undef UTILS_HAS_SANITIZE_MEMORY
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#define UTILS_HAS_SANITIZE_MEMORY 1
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#endif
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/*
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* helps the compiler's optimizer predicting branches
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*/
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#if __has_builtin(__builtin_expect)
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# ifdef __cplusplus
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# define UTILS_LIKELY( exp ) (__builtin_expect( !!(exp), true ))
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# define UTILS_UNLIKELY( exp ) (__builtin_expect( !!(exp), false ))
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# else
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# define UTILS_LIKELY( exp ) (__builtin_expect( !!(exp), 1 ))
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# define UTILS_UNLIKELY( exp ) (__builtin_expect( !!(exp), 0 ))
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# endif
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#else
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# define UTILS_LIKELY( exp ) (!!(exp))
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# define UTILS_UNLIKELY( exp ) (!!(exp))
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#endif
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#if __has_builtin(__builtin_prefetch)
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# define UTILS_PREFETCH( exp ) (__builtin_prefetch(exp))
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#else
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# define UTILS_PREFETCH( exp )
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#endif
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#if __has_builtin(__builtin_assume)
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# define UTILS_ASSUME( exp ) (__builtin_assume(exp))
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#else
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# define UTILS_ASSUME( exp )
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#endif
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#if (defined(__i386__) || defined(__x86_64__))
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# define UTILS_HAS_HYPER_THREADING 1 // on x86 we assume we have hyper-threading.
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#else
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# define UTILS_HAS_HYPER_THREADING 0
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#endif
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#if defined(FILAMENT_SINGLE_THREADED)
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# define UTILS_HAS_THREADING 0
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#elif defined(__EMSCRIPTEN__)
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# if defined(__EMSCRIPTEN_PTHREADS__) && defined(FILAMENT_WASM_THREADS)
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# define UTILS_HAS_THREADING 1
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# else
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# define UTILS_HAS_THREADING 0
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# endif
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#else
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# define UTILS_HAS_THREADING 1
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#endif
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#if __has_attribute(noinline)
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#define UTILS_NOINLINE __attribute__((noinline))
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#else
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#define UTILS_NOINLINE
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#endif
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#if __has_attribute(always_inline)
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#define UTILS_ALWAYS_INLINE __attribute__((always_inline))
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#else
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#define UTILS_ALWAYS_INLINE
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#endif
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#if __has_attribute(pure)
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#define UTILS_PURE __attribute__((pure))
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#else
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#define UTILS_PURE
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#endif
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#if __has_attribute(maybe_unused) || (defined(_MSC_VER) && _MSC_VER >= 1911)
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#define UTILS_UNUSED [[maybe_unused]]
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#define UTILS_UNUSED_IN_RELEASE [[maybe_unused]]
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#elif __has_attribute(unused)
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#define UTILS_UNUSED __attribute__((unused))
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#define UTILS_UNUSED_IN_RELEASE __attribute__((unused))
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#else
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#define UTILS_UNUSED
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#define UTILS_UNUSED_IN_RELEASE
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#endif
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#if defined(_MSC_VER) && _MSC_VER >= 1900
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# define UTILS_RESTRICT __restrict
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#elif (defined(__clang__) || defined(__GNUC__))
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# define UTILS_RESTRICT __restrict__
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#else
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# define UTILS_RESTRICT
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#endif
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#if defined(_MSC_VER) && _MSC_VER >= 1900
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# define UTILS_HAS_FEATURE_CXX_THREAD_LOCAL 1
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#elif __has_feature(cxx_thread_local)
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# define UTILS_HAS_FEATURE_CXX_THREAD_LOCAL 1
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#else
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# define UTILS_HAS_FEATURE_CXX_THREAD_LOCAL 0
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#endif
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#if defined(_MSC_VER)
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// MSVC does not support loop unrolling hints
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# define UTILS_UNROLL
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# define UTILS_NOUNROLL
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#else
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// C++11 allows pragmas to be specified as part of defines using the _Pragma syntax.
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# define UTILS_UNROLL _Pragma("unroll")
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# define UTILS_NOUNROLL _Pragma("nounroll")
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#endif
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#if __has_feature(cxx_rtti) || defined(_CPPRTTI)
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# define UTILS_HAS_RTTI 1
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#else
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# define UTILS_HAS_RTTI 0
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#endif
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#ifdef __ARM_ACLE
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# include <arm_acle.h>
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# define UTILS_WAIT_FOR_INTERRUPT() __wfi()
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# define UTILS_WAIT_FOR_EVENT() __wfe()
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# define UTILS_BROADCAST_EVENT() __sev()
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# define UTILS_SIGNAL_EVENT() __sevl()
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# define UTILS_PAUSE() __yield()
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# define UTILS_PREFETCHW(addr) __pldx(1, 0, 0, addr)
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#else // !__ARM_ACLE
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# if (defined(__i386__) || defined(__x86_64__))
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# define UTILS_X86_PAUSE {__asm__ __volatile__( "rep; nop" : : : "memory" );}
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# define UTILS_WAIT_FOR_INTERRUPT() UTILS_X86_PAUSE
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# define UTILS_WAIT_FOR_EVENT() UTILS_X86_PAUSE
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# define UTILS_BROADCAST_EVENT()
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# define UTILS_SIGNAL_EVENT()
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# define UTILS_PAUSE() UTILS_X86_PAUSE
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# define UTILS_PREFETCHW(addr) UTILS_PREFETCH(addr)
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# else // !x86
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# define UTILS_WAIT_FOR_INTERRUPT()
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# define UTILS_WAIT_FOR_EVENT()
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# define UTILS_BROADCAST_EVENT()
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# define UTILS_SIGNAL_EVENT()
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# define UTILS_PAUSE()
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# define UTILS_PREFETCHW(addr) UTILS_PREFETCH(addr)
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# endif // x86
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#endif // __ARM_ACLE
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// ssize_t is a POSIX type.
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#if defined(WIN32) || defined(_WIN32)
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#include <Basetsd.h>
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typedef SSIZE_T ssize_t;
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#endif
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#ifdef _MSC_VER
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# define UTILS_EMPTY_BASES __declspec(empty_bases)
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#else
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# define UTILS_EMPTY_BASES
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#endif
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#if defined(WIN32) || defined(_WIN32)
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#define IMPORTSYMB __declspec(dllimport)
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#else
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#define IMPORTSYMB
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#endif
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#if defined(_MSC_VER) && !defined(__PRETTY_FUNCTION__)
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# define __PRETTY_FUNCTION__ __FUNCSIG__
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#endif
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#if defined(_MSC_VER)
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# define UTILS_WARNING_PUSH _Pragma("warning( push )")
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# define UTILS_WARNING_POP _Pragma("warning( pop )")
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# define UTILS_WARNING_ENABLE_PADDED _Pragma("warning(1: 4324)")
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#elif defined(__clang__)
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# define UTILS_WARNING_PUSH _Pragma("clang diagnostic push")
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# define UTILS_WARNING_POP _Pragma("clang diagnostic pop")
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# define UTILS_WARNING_ENABLE_PADDED _Pragma("clang diagnostic warning \"-Wpadded\"")
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#else
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# define UTILS_WARNING_PUSH
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# define UTILS_WARNING_POP
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# define UTILS_WARNING_ENABLE_PADDED
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#endif
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#endif // TNT_UTILS_COMPILER_H
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