diff options
Diffstat (limited to 'WebKit/android/stlport/stl/_threads.c')
| -rw-r--r-- | WebKit/android/stlport/stl/_threads.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/WebKit/android/stlport/stl/_threads.c b/WebKit/android/stlport/stl/_threads.c deleted file mode 100644 index 40641e8..0000000 --- a/WebKit/android/stlport/stl/_threads.c +++ /dev/null @@ -1,171 +0,0 @@ -/* - * - * - * Copyright (c) 1994 - * Hewlett-Packard Company - * - * Copyright (c) 1996,1997 - * Silicon Graphics Computer Systems, Inc. - * - * Copyright (c) 1997 - * Moscow Center for SPARC Technology - * - * Copyright (c) 1999 - * Boris Fomitchev - * - * This material is provided "as is", with absolutely no warranty expressed - * or implied. Any use is at your own risk. - * - * Permission to use or copy this software for any purpose is hereby granted - * without fee, provided the above notices are retained on all copies. - * Permission to modify the code and to distribute modified code is granted, - * provided the above notices are retained, and a notice that the code was - * modified is included with the above copyright notice. - * - */ -#ifndef _STLP_THREADS_C -#define _STLP_THREADS_C - -#ifndef _STLP_INTERNAL_THREADS_H -# include <stl/_threads.h> -#endif - -#if defined (_STLP_EXPOSE_GLOBALS_IMPLEMENTATION) - -#if defined (_STLP_SGI_THREADS) -# include <time.h> -#elif defined (_STLP_UNIX) -# ifndef _STLP_INTERNAL_CTIME -# include <stl/_ctime.h> -# endif -# if defined (_STLP_USE_NAMESPACES) && !defined (_STLP_VENDOR_GLOBAL_CSTD) -using _STLP_VENDOR_CSTD::time_t; -# endif -# include <sys/time.h> -#endif - -_STLP_BEGIN_NAMESPACE - -#if (_STLP_STATIC_TEMPLATE_DATA > 0) - -# if defined (_STLP_USE_ATOMIC_SWAP_MUTEX) -template<int __32bits> -_STLP_STATIC_MUTEX -_Atomic_swap_struct<__32bits>::_S_swap_lock _STLP_MUTEX_INITIALIZER; -# undef _STLP_USE_ATOMIC_SWAP_MUTEX -# endif - -# if defined (_STLP_THREADS) && !defined (_STLP_USE_PTHREAD_SPINLOCK) -template <int __inst> -unsigned _STLP_mutex_spin<__inst>::__max = _STLP_mutex_spin<__inst>::__low_max; - -template <int __inst> -unsigned _STLP_mutex_spin<__inst>::__last = 0; -# endif // _STLP_USE_PTHREAD_SPINLOCK - -#else /* ( _STLP_STATIC_TEMPLATE_DATA > 0 ) */ - -# if defined (_STLP_USE_ATOMIC_SWAP_MUTEX) -__DECLARE_INSTANCE(_STLP_STATIC_MUTEX, _Atomic_swap_struct<sizeof(__stl_atomic_t) == sizeof(void*)>::_S_swap_lock, - _STLP_MUTEX_INITIALIZER ); -# undef _STLP_USE_ATOMIC_SWAP_MUTEX -# endif /* _STLP_PTHREADS */ - -# if defined (_STLP_THREADS) && !defined (_STLP_USE_PTHREAD_SPINLOCK) -__DECLARE_INSTANCE(unsigned, _STLP_mutex_spin<0>::__max, =30); -__DECLARE_INSTANCE(unsigned, _STLP_mutex_spin<0>::__last, =0); -# endif // _STLP_USE_PTHREAD_SPINLOCK - -#endif /* ( _STLP_STATIC_TEMPLATE_DATA > 0 ) */ - -#if defined (_STLP_THREADS) && !defined (_STLP_USE_PTHREAD_SPINLOCK) - -# if defined (_STLP_SPARC_SOLARIS_THREADS) -// underground function in libc.so; we do not want dependance on librt -extern "C" int __nanosleep(const struct timespec*, struct timespec*); -# define _STLP_NANOSLEEP __nanosleep -# else -# define _STLP_NANOSLEEP nanosleep -# endif - -template <int __inst> -void _STLP_CALL -_STLP_mutex_spin<__inst>::_S_nsec_sleep(int __log_nsec) { -# if defined (_STLP_WIN32THREADS) - if (__log_nsec <= 20) { - // Note from boost (www.boost.org): - // Changed to Sleep(1) from Sleep(0). - // According to MSDN, Sleep(0) will never yield - // to a lower-priority thread, whereas Sleep(1) - // will. Performance seems not to be affected. - Sleep(1); - } else { - Sleep(1 << (__log_nsec - 20)); - } -# elif defined(_STLP_OS2THREADS) - if (__log_nsec <= 20) { - DosSleep(0); - } else { - DosSleep(1 << (__log_nsec - 20)); - } -# elif defined (_STLP_UNIX) - timespec __ts; - /* Max sleep is 2**27nsec ~ 60msec */ - __ts.tv_sec = 0; - __ts.tv_nsec = 1 << __log_nsec; - _STLP_NANOSLEEP(&__ts, 0); -# endif -} - -template <int __inst> -void _STLP_CALL -_STLP_mutex_spin<__inst>::_M_do_lock(volatile __stl_atomic_t* __lock) { -# if defined(_STLP_ATOMIC_EXCHANGE) - if (_Atomic_swap(__lock, 1)) { - unsigned __my_spin_max = _STLP_mutex_spin<0>::__max; - unsigned __my_last_spins = _STLP_mutex_spin<0>::__last; - volatile unsigned __junk = 17; // Value doesn't matter. - unsigned __i; - - for (__i = 0; __i < __my_spin_max; ++__i) { - if (__i < __my_last_spins/2 || *__lock) { - __junk *= __junk; __junk *= __junk; - __junk *= __junk; __junk *= __junk; - } else { - if (!_Atomic_swap(__lock, 1)) { - // got it! - // Spinning worked. Thus we're probably not being scheduled - // against the other process with which we were contending. - // Thus it makes sense to spin longer the next time. - _STLP_mutex_spin<0>::__last = __i; - _STLP_mutex_spin<0>::__max = _STLP_mutex_spin<0>::__high_max; - return; - } - } - } - - // We are probably being scheduled against the other process. Sleep. - _STLP_mutex_spin<0>::__max = _STLP_mutex_spin<0>::__low_max; - - for (__i = 0 ;; ++__i) { - int __log_nsec = __i + 6; - - if (__log_nsec > 27) __log_nsec = 27; - if (!_Atomic_swap(__lock, 1)) { - break; - } - _S_nsec_sleep(__log_nsec); - } - } /* first _Atomic_swap */ -# endif -} -#endif // _STLP_USE_PTHREAD_SPINLOCK - -_STLP_END_NAMESPACE - -#endif /* _STLP_EXPOSE_GLOBALS_IMPLEMENTATION */ -#endif /* _STLP_THREADS_C */ - -// Local Variables: -// mode:C++ -// End: |