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| author | Max Kellermann <max@duempel.org> | 2015-08-25 12:46:12 +0200 |
|---|---|---|
| committer | Max Kellermann <max@duempel.org> | 2015-08-25 12:46:12 +0200 |
| commit | 75dff6445063d9b49cca126fd661c9abbd680977 (patch) | |
| tree | 585a91e6e91b7f5641d2093d98a4bf43df29d531 /src | |
| parent | f0b58c6f2463da0b7f509a53d8054d5472504094 (diff) | |
| download | mpd-75dff6445063d9b49cca126fd661c9abbd680977.tar.gz mpd-75dff6445063d9b49cca126fd661c9abbd680977.tar.xz mpd-75dff6445063d9b49cca126fd661c9abbd680977.zip | |
thread/Posix{Mutex,Cond}: use "constexpr" only with glibc
Apparently all other C libraries are not compatible with "constexpr".
Those which are not will get a performance penalty, but at least they
work at all.
Diffstat (limited to 'src')
| -rw-r--r-- | src/thread/PosixCond.hxx | 16 | ||||
| -rw-r--r-- | src/thread/PosixMutex.hxx | 16 |
2 files changed, 16 insertions, 16 deletions
diff --git a/src/thread/PosixCond.hxx b/src/thread/PosixCond.hxx index b3fe204e1..73dbe0218 100644 --- a/src/thread/PosixCond.hxx +++ b/src/thread/PosixCond.hxx @@ -1,5 +1,5 @@ /* - * Copyright (C) 2009-2013 Max Kellermann <max@duempel.org> + * Copyright (C) 2009-2015 Max Kellermann <max@duempel.org> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -41,9 +41,13 @@ class PosixCond { pthread_cond_t cond; public: -#if defined(__NetBSD__) || defined(__BIONIC__) - /* NetBSD's PTHREAD_COND_INITIALIZER is not compatible with - "constexpr" */ +#ifdef __GLIBC__ + /* optimized constexpr constructor for pthread implementations + that support it */ + constexpr PosixCond():cond(PTHREAD_COND_INITIALIZER) {} +#else + /* slow fallback for pthread implementations that are not + compatible with "constexpr" */ PosixCond() { pthread_cond_init(&cond, nullptr); } @@ -51,10 +55,6 @@ public: ~PosixCond() { pthread_cond_destroy(&cond); } -#else - /* optimized constexpr constructor for sane POSIX - implementations */ - constexpr PosixCond():cond(PTHREAD_COND_INITIALIZER) {} #endif PosixCond(const PosixCond &other) = delete; diff --git a/src/thread/PosixMutex.hxx b/src/thread/PosixMutex.hxx index 5805158d5..e0fd614c8 100644 --- a/src/thread/PosixMutex.hxx +++ b/src/thread/PosixMutex.hxx @@ -1,5 +1,5 @@ /* - * Copyright (C) 2009-2013 Max Kellermann <max@duempel.org> + * Copyright (C) 2009-2015 Max Kellermann <max@duempel.org> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -41,9 +41,13 @@ class PosixMutex { pthread_mutex_t mutex; public: -#if defined(__NetBSD__) || defined(__BIONIC__) - /* NetBSD's PTHREAD_MUTEX_INITIALIZER is not compatible with - "constexpr" */ +#ifdef __GLIBC__ + /* optimized constexpr constructor for pthread implementations + that support it */ + constexpr PosixMutex():mutex(PTHREAD_MUTEX_INITIALIZER) {} +#else + /* slow fallback for pthread implementations that are not + compatible with "constexpr" */ PosixMutex() { pthread_mutex_init(&mutex, nullptr); } @@ -51,10 +55,6 @@ public: ~PosixMutex() { pthread_mutex_destroy(&mutex); } -#else - /* optimized constexpr constructor for sane POSIX - implementations */ - constexpr PosixMutex():mutex(PTHREAD_MUTEX_INITIALIZER) {} #endif PosixMutex(const PosixMutex &other) = delete; |