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dtoolbase: enable use of std::atomic_flag, also on macOS

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This commit is contained in:
rdb 2018-09-04 11:41:12 +02:00
parent 217cecb77f
commit 670047b4b0
1 changed files with 49 additions and 16 deletions
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65
dtool/src/dtoolbase/dtoolbase_cc.h
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@ -49,6 +49,8 @@
// interrogate pass (CPPPARSER isn't defined), this maps to public. // interrogate pass (CPPPARSER isn't defined), this maps to public.
#define PUBLISHED __published #define PUBLISHED __published
#define PHAVE_ATOMIC 1
typedef int ios_openmode; typedef int ios_openmode;
typedef int ios_fmtflags; typedef int ios_fmtflags;
typedef int ios_iostate; typedef int ios_iostate;
@ -93,6 +95,23 @@ typedef std::ios::iostate ios_iostate;
typedef std::ios::seekdir ios_seekdir; typedef std::ios::seekdir ios_seekdir;
#endif #endif
#ifdef _MSC_VER
#define ALWAYS_INLINE __forceinline
#elif defined(__GNUC__)
#define ALWAYS_INLINE __attribute__((always_inline)) inline
#else
#define ALWAYS_INLINE inline
#endif
#ifdef FORCE_INLINING
// If FORCE_INLINING is defined, we use the keyword __forceinline, which tells
// MS VC++ to override its internal benefit heuristic and inline the fn if it
// is technically possible to do so.
#define INLINE ALWAYS_INLINE
#else
#define INLINE inline
#endif
// Apple has an outdated libstdc++. Not all is lost, though, as we can fill // Apple has an outdated libstdc++. Not all is lost, though, as we can fill
// in some important missing functions. // in some important missing functions.
#if defined(__GLIBCXX__) && __GLIBCXX__ <= 20070719 #if defined(__GLIBCXX__) && __GLIBCXX__ <= 20070719
@ -115,24 +134,38 @@ namespace std {
} }
template<class T> struct owner_less; template<class T> struct owner_less;
typedef enum memory_order {
memory_order_relaxed,
memory_order_consume,
memory_order_acquire,
memory_order_release,
memory_order_acq_rel,
memory_order_seq_cst,
} memory_order;
#define ATOMIC_FLAG_INIT { 0 }
class atomic_flag {
bool _flag;
public:
atomic_flag() noexcept = default;
ALWAYS_INLINE constexpr atomic_flag(bool flag) noexcept : _flag(flag) {}
atomic_flag(const atomic_flag &) = delete;
~atomic_flag() noexcept = default;
atomic_flag &operator = (const atomic_flag&) = delete;
ALWAYS_INLINE bool test_and_set(memory_order order = memory_order_seq_cst) noexcept {
return __atomic_test_and_set(&_flag, order);
}
ALWAYS_INLINE void clear(memory_order order = memory_order_seq_cst) noexcept {
__atomic_clear(&_flag, order);
}
};
}; };
#endif
#ifdef _MSC_VER
#define ALWAYS_INLINE __forceinline
#elif defined(__GNUC__)
#define ALWAYS_INLINE __attribute__((always_inline)) inline
#else #else
#define ALWAYS_INLINE inline // Expect that we have access to the <atomic> header.
#endif #define PHAVE_ATOMIC 1
#ifdef FORCE_INLINING
// If FORCE_INLINING is defined, we use the keyword __forceinline, which tells
// MS VC++ to override its internal benefit heuristic and inline the fn if it
// is technically possible to do so.
#define INLINE ALWAYS_INLINE
#else
#define INLINE inline
#endif #endif
// Determine the availability of C++11 features. // Determine the availability of C++11 features.