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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--Syntax highlighting generated by Web C Plus Plus software v0.8.2Webcpp Copyright (C)2001, (C)2002, (C)2003 Jeffrey Bakker under the GNU GPLGet webcpp at http://webcpp.sf.net--><html><head><title>pasync.h</title><style type="text/css">/*Webcpp v0.8.1 compatible StyleSheethttp://webcpp.sf.netTheme: ide-msvcpp*/body{background-color: #ffffff}.webcpp a:link {color:#000000}.webcpp a:visited {color:#008000}.webcpp a:active {color:#0000ff}.webcpp a:hover {color:#0000ff}.webcpp pre{color: #000000}.webcpp font{font-size:100%}.webcpp .symbols{color: #000000}.webcpp .preproc{color: #0000ff}.webcpp .integer{color: #000000}.webcpp .floatpt{color: #000000}.webcpp .dblquot{color: #000000}.webcpp .sinquot{color: #000000}.webcpp .keyword{color: #0000ff;}.webcpp .keytype{color: #0000ff;}.webcpp .comment{color: #008000;}</style></head><body bgcolor="#FFFFFF" leftmargin="40" marginwidth="40"> <p><a href="../htsrc.html">Index</a><hr noshade></p><div class="webcpp"><pre><font CLASS=preproc>#ifndef</font> __PASYNC_H__ <font CLASS=preproc>#define</font> __PASYNC_H__ <font CLASS=preproc>#ifdef</font> WIN32 <font CLASS=preproc>#</font> define _WINSOCKAPI_ <font CLASS=comment>// prevent inclusion of winsock.h, since we need winsock2.h </font><font CLASS=preproc>#</font> include <windows.h> <font CLASS=preproc>#else</font> <font CLASS=preproc>#</font> include <pthread.h> <font CLASS=preproc>#</font> ifndef __bsdi__ <font CLASS=preproc>#</font> include <semaphore.h> <font CLASS=preproc>#</font> endif <font CLASS=preproc>#endif</font> <font CLASS=preproc>#ifndef</font> __PPORT_H__ <font CLASS=preproc>#include</font> <font CLASS=dblquot>"pport.h"</font> <font CLASS=preproc>#endif</font> <font CLASS=preproc>#ifndef</font> __PTYPES_H__ <font CLASS=preproc>#include</font> <font CLASS=dblquot>"ptypes.h"</font> <font CLASS=preproc>#endif</font> PTYPES_BEGIN<font CLASS=comment>//</font><font CLASS=comment>// Summary of implementation:</font><font CLASS=comment>//</font><font CLASS=comment>// atomic increment/decrement/exchange</font><font CLASS=comment>// MSVC/BCC/i386: internal, asm</font><font CLASS=comment>// GCC/i386: internal, asm</font><font CLASS=comment>// GCC/PowerPC: internal, asm</font><font CLASS=comment>// Other: internal, mutex hash table</font><font CLASS=comment>//</font><font CLASS=comment>// mutex</font><font CLASS=comment>// Win32: Critical section</font><font CLASS=comment>// Other: POSIX mutex</font><font CLASS=comment>//</font><font CLASS=comment>// trigger</font><font CLASS=comment>// Win32: Event</font><font CLASS=comment>// Other: internal, POSIX condvar/mutex</font><font CLASS=comment>//</font><font CLASS=comment>// rwlock:</font><font CLASS=comment>// Win32: internal, Event/mutex</font><font CLASS=comment>// MacOS: internal, POSIX condvar/mutex</font><font CLASS=comment>// Other: POSIX rwlock</font><font CLASS=comment>//</font><font CLASS=comment>// semaphore:</font><font CLASS=comment>// Win32: = timedsem</font><font CLASS=comment>// MacOS: = timedsem</font><font CLASS=comment>// Other: POSIX semaphore</font><font CLASS=comment>//</font><font CLASS=comment>// timedsem (with timed waiting):</font><font CLASS=comment>// Win32: Semaphore</font><font CLASS=comment>// Other: internal, POSIX mutex/condvar</font><font CLASS=comment>//</font><font CLASS=preproc>#ifdef</font> _MSC_VER <font CLASS=preproc>#pragma</font> pack(<font CLASS=keyword>push</font>, <font CLASS=integer>4</font>) <font CLASS=preproc>#endif</font> <font CLASS=preproc>#ifdef</font> WIN32 typedef <font CLASS=keyword>int</font> pthread_id_t<font CLASS=comment>;</font> typedef HANDLE pthread_t<font CLASS=comment>;</font><font CLASS=preproc>#else</font> typedef pthread_t pthread_id_t<font CLASS=comment>;</font><font CLASS=preproc>#endif</font> void psleep(uint milliseconds)<font CLASS=comment>;</font>bool pthrequal(pthread_id_t id)<font CLASS=comment>; // note: this is NOT the thread handle, use thread::get_id()</font>pthread_id_t pthrself()<font CLASS=comment>; // ... same</font><font CLASS=comment>// -------------------------------------------------------------------- //</font><font CLASS=comment>// --- mutex ---------------------------------------------------------- //</font><font CLASS=comment>// -------------------------------------------------------------------- //</font><font CLASS=preproc>#ifdef</font> WIN32 struct mutex: public noncopyable{<font CLASS=preproc>protected:</font> CRITICAL_SECTION critsec<font CLASS=comment>;</font><font CLASS=preproc>public:</font> mutex() { InitializeCriticalSection(&<font CLASS=comment>;critsec); }</font> ~mutex() { DeleteCriticalSection(&critsec); } <font CLASS=keytype>void</font> enter() { EnterCriticalSection(&critsec); } <font CLASS=keytype>void</font> leave() { LeaveCriticalSection(&critsec); } <font CLASS=keytype>void</font> lock() { enter(); } <font CLASS=keytype>void</font> unlock() { leave(); }};<font CLASS=preproc>#else</font> <font CLASS=keyword>struct</font> mutex: public noncopyable{<font CLASS=preproc><font CLASS=keyword>protected</font>:</font> pthread_mutex_t mtx;<font CLASS=preproc><font CLASS=keyword>public</font>:</font> mutex() { pthread_mutex_init(&mtx, <font CLASS=integer>0</font>); } ~mutex() { pthread_mutex_destroy(&mtx); } <font CLASS=keytype>void</font> enter() { pthread_mutex_lock(&mtx); } <font CLASS=keytype>void</font> leave() { pthread_mutex_unlock(&mtx); } <font CLASS=keytype>void</font> lock() { enter(); } <font CLASS=keytype>void</font> unlock() { leave(); }};<font CLASS=preproc>#endif</font> <font CLASS=comment>//</font><font CLASS=comment>// scopelock</font><font CLASS=comment>//</font><font CLASS=keyword>class</font> scopelock: <font CLASS=keyword>public</font> noncopyable{<font CLASS=preproc><font CLASS=keyword>protected</font>:</font> mutex* mtx;<font CLASS=preproc><font CLASS=keyword>public</font>:</font> scopelock(mutex& imtx): mtx(&imtx) { mtx<font CLASS=symbols>-</font>>lock(); } ~scopelock() { mtx<font CLASS=symbols>-</font>>unlock(); }};<font CLASS=comment>//</font><font CLASS=comment>// mutex table for hashed memory locking (undocumented)</font><font CLASS=comment>//</font><font CLASS=preproc>#define</font> _MUTEX_HASH_SIZE <font CLASS=integer>29</font> <font CLASS=comment>// a prime number for hashing </font><font CLASS=preproc>#ifdef</font> WIN32 <font CLASS=preproc>#</font> define pmemlock mutex <font CLASS=preproc>#</font> define pmementer(m) (m)<font CLASS=symbols>-</font>>lock() <font CLASS=preproc>#</font> define pmemleave(m) (m)<font CLASS=symbols>-</font>>unlock() <font CLASS=preproc>#else</font> <font CLASS=preproc>#</font> define _MTX_INIT PTHREAD_MUTEX_INITIALIZER <font CLASS=preproc>#</font> define pmemlock pthread_mutex_t <font CLASS=preproc>#</font> define pmementer pthread_mutex_lock <font CLASS=preproc>#</font> define pmemleave pthread_mutex_unlock <font CLASS=preproc>#endif</font> <font CLASS=keyword>extern</font> pmemlock _mtxtable[_MUTEX_HASH_SIZE];<font CLASS=preproc>#define</font> pgetmemlock(addr) (_mtxtable <font CLASS=symbols>+</font> pintptr(addr) % _MUTEX_HASH_SIZE) <font CLASS=comment>// -------------------------------------------------------------------- //</font><font CLASS=comment>// --- trigger -------------------------------------------------------- //</font><font CLASS=comment>// -------------------------------------------------------------------- //</font><font CLASS=preproc>#ifdef</font> WIN32 <font CLASS=keyword>class</font> trigger: public noncopyable{<font CLASS=preproc><font CLASS=keyword>protected</font>:</font> HANDLE handle; <font CLASS=comment>// Event object</font><font CLASS=preproc><font CLASS=keyword>public</font>:</font> trigger(<font CLASS=keytype>bool</font> autoreset, <font CLASS=keytype>bool</font> state); ~trigger() { CloseHandle(handle); } <font CLASS=keytype>void</font> wait() { WaitForSingleObject(handle, INFINITE); } <font CLASS=keytype>void</font> post() { SetEvent(handle); } <font CLASS=keytype>void</font> signal() { post(); } <font CLASS=keytype>void</font> reset() { ResetEvent(handle); }};<font CLASS=preproc>#else</font> <font CLASS=keyword>class</font> trigger: public noncopyable{<font CLASS=preproc><font CLASS=keyword>protected</font>:</font> pthread_mutex_t mtx; pthread_cond_t cond; <font CLASS=keytype>int</font> state; <font CLASS=keytype>bool</font> autoreset;<font CLASS=preproc><font CLASS=keyword>public</font>:</font> trigger(<font CLASS=keytype>bool</font> autoreset, <font CLASS=keytype>bool</font> state); ~trigger(); <font CLASS=keytype>void</font> wait(); <font CLASS=keytype>void</font> post(); <font CLASS=keytype>void</font> signal() { post(); } <font CLASS=keytype>void</font> reset();};<font CLASS=preproc>#endif</font> <font CLASS=comment>// -------------------------------------------------------------------- //</font><font CLASS=comment>// --- rwlock --------------------------------------------------------- //</font><font CLASS=comment>// -------------------------------------------------------------------- //</font><font CLASS=preproc>#if</font> defined(WIN32) <font CLASS=symbols>||</font> defined(__DARWIN__) <font CLASS=symbols>||</font> defined(__bsdi__) <font CLASS=preproc>#</font> define __PTYPES_RWLOCK__ <font CLASS=preproc>#elif</font> defined(linux) <font CLASS=comment>// on Linux rwlocks are included only with -D_GNU_SOURCE.</font> <font CLASS=comment>// programs that don't use rwlocks, do not need to define</font> <font CLASS=comment>// _GNU_SOURCE either.</font><font CLASS=preproc>#</font> <font CLASS=keyword>if</font> defined(_GNU_SOURCE) <font CLASS=symbols>||</font> defined(__USE_UNIX98) <font CLASS=preproc>#</font> define __POSIX_RWLOCK__ <font CLASS=preproc>#</font> endif <font CLASS=preproc>#else</font> <font CLASS=preproc>#</font> define __POSIX_RWLOCK__ <font CLASS=preproc>#endif</font> <font CLASS=preproc>#ifdef</font> __PTYPES_RWLOCK__ <font CLASS=keyword>struct</font> rwlock: <font CLASS=keyword>protected</font> mutex{<font CLASS=preproc><font CLASS=keyword>protected</font>:</font><font CLASS=preproc>#ifdef</font> WIN32 HANDLE reading; <font CLASS=comment>// Event object</font> HANDLE finished; <font CLASS=comment>// Event object</font> <font CLASS=keytype>int</font> readcnt;⌨️ 快捷键说明
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