--- parser3/src/include/pa_threads.h 2001/03/20 06:45:18 1.10 +++ parser3/src/include/pa_threads.h 2001/05/17 09:47:17 1.13 @@ -5,27 +5,30 @@ Author: Alexander Petrosyan (http://design.ru/paf) - $Id: pa_threads.h,v 1.10 2001/03/20 06:45:18 paf Exp $ + $Id: pa_threads.h,v 1.13 2001/05/17 09:47:17 parser Exp $ */ #ifndef PA_THREADS_H #define PA_THREADS_H -#ifdef HAVE_CONFIG_H -# include "pa_config.h" -#endif +#include "pa_config_includes.h" #include "pa_types.h" #ifdef MULTITHREAD +class AutoSYNCHRONIZED; + /// simple semaphore object class Mutex { + friend AutoSYNCHRONIZED; +private: uint handle; public: Mutex(); ~Mutex(); +private: // for AutoSYNCHRONIZED void acquire(); void release(); }; @@ -38,35 +41,25 @@ extern Mutex global_mutex; Use it with SYNCHRONIZED macro */ class AutoSYNCHRONIZED { - bool thread_safe; public: - AutoSYNCHRONIZED(bool athread_safe) : thread_safe(athread_safe) { - if(thread_safe) - global_mutex.acquire(); - } - ~AutoSYNCHRONIZED() { - if(thread_safe) - global_mutex.release(); - } + AutoSYNCHRONIZED() { global_mutex.acquire(); } + ~AutoSYNCHRONIZED() { global_mutex.release(); } }; /** put it to first line of a function to ensure thread safety. @verbatim - void someclass::somefunc(...) { SYNCHRONIZED(thread_safe); + void someclass::somefunc(...) { SYNCHRONIZED; ... } @endverbatim - considering @a thread_safe to be the object field to flag - whether safety is really needed in this particular object instance + WARNING: don't use THROW or PTHROW with such thread safety mechanizm - + longjump would leave global_mutex acquired, which is wrong! */ -#define SYNCHRONIZED(athread_safe) AutoSYNCHRONIZED autoSYNCHRONIZED(athread_safe) - +# define SYNCHRONIZED AutoSYNCHRONIZED autoSYNCHRONIZED() #else // not MULTITHREAD-ed - -#define SYNCHRONIZED(athread_safe) /* do nothing */ - +# define SYNCHRONIZED /* do nothing */ #endif