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src/server/spserver/spthreadpool.cpp
0 → 100644
1 | +/* | |
2 | + * Copyright 2007 Stephen Liu | |
3 | + * For license terms, see the file COPYING along with this library. | |
4 | + */ | |
5 | + | |
6 | +#include <stdlib.h> | |
7 | +#include <string.h> | |
8 | +#include <stdio.h> | |
9 | + | |
10 | +#include "spporting.hpp" | |
11 | + | |
12 | +#include "spthreadpool.hpp" | |
13 | + | |
14 | +typedef struct tagSP_Thread { | |
15 | + sp_thread_t mId; | |
16 | + sp_thread_mutex_t mMutex; | |
17 | + sp_thread_cond_t mCond; | |
18 | + SP_ThreadPool::DispatchFunc_t mFunc; | |
19 | + void * mArg; | |
20 | + SP_ThreadPool * mParent; | |
21 | +} SP_Thread_t; | |
22 | + | |
23 | +SP_ThreadPool :: SP_ThreadPool( int maxThreads, const char * tag ) | |
24 | +{ | |
25 | + if( maxThreads <= 0 ) maxThreads = 2; | |
26 | + | |
27 | + sp_thread_mutex_init( &mMainMutex, NULL ); | |
28 | + sp_thread_cond_init( &mIdleCond, NULL ); | |
29 | + sp_thread_cond_init( &mFullCond, NULL ); | |
30 | + sp_thread_cond_init( &mEmptyCond, NULL ); | |
31 | + mMaxThreads = maxThreads; | |
32 | + mIndex = 0; | |
33 | + mIsShutdown = 0; | |
34 | + mTotal = 0; | |
35 | + | |
36 | + tag = NULL == tag ? "unknown" : tag; | |
37 | + mTag = strdup( tag ); | |
38 | + | |
39 | + mThreadList = ( SP_Thread_t ** )malloc( sizeof( void * ) * mMaxThreads ); | |
40 | + memset( mThreadList, 0, sizeof( void * ) * mMaxThreads ); | |
41 | +} | |
42 | + | |
43 | +SP_ThreadPool :: ~SP_ThreadPool() | |
44 | +{ | |
45 | + sp_thread_mutex_lock( &mMainMutex ); | |
46 | + | |
47 | + if( mIndex < mTotal ) { | |
48 | + sp_syslog( LOG_NOTICE, "[tp@%s] waiting for %d thread(s) to finish\n", mTag, mTotal - mIndex ); | |
49 | + sp_thread_cond_wait( &mFullCond, &mMainMutex ); | |
50 | + } | |
51 | + | |
52 | + mIsShutdown = 1; | |
53 | + | |
54 | + int i = 0; | |
55 | + | |
56 | + for( i = 0; i < mIndex; i++ ) { | |
57 | + SP_Thread_t * thread = mThreadList[ i ]; | |
58 | + sp_thread_mutex_lock( &thread->mMutex ); | |
59 | + sp_thread_cond_signal( &thread->mCond ) ; | |
60 | + sp_thread_mutex_unlock ( &thread->mMutex ); | |
61 | + } | |
62 | + | |
63 | + if( mTotal > 0 ) { | |
64 | + sp_syslog( LOG_NOTICE, "[tp@%s] waiting for %d thread(s) to exit\n", mTag, mTotal ); | |
65 | + sp_thread_cond_wait( &mEmptyCond, &mMainMutex ); | |
66 | + } | |
67 | + | |
68 | + sp_syslog( LOG_NOTICE, "[tp@%s] destroy %d thread structure(s)\n", mTag, mIndex ); | |
69 | + for( i = 0; i < mIndex; i++ ) { | |
70 | + SP_Thread_t * thread = mThreadList[ i ]; | |
71 | + sp_thread_mutex_destroy( &thread->mMutex ); | |
72 | + sp_thread_cond_destroy( &thread->mCond ); | |
73 | + free( thread ); | |
74 | + mThreadList[ i ] = NULL; | |
75 | + } | |
76 | + | |
77 | + sp_thread_mutex_unlock( &mMainMutex ); | |
78 | + | |
79 | + mIndex = 0; | |
80 | + | |
81 | + sp_thread_mutex_destroy( &mMainMutex ); | |
82 | + sp_thread_cond_destroy( &mIdleCond ); | |
83 | + sp_thread_cond_destroy( &mFullCond ); | |
84 | + sp_thread_cond_destroy( &mEmptyCond ); | |
85 | + | |
86 | + free( mThreadList ); | |
87 | + mThreadList = NULL; | |
88 | + | |
89 | + free( mTag ); | |
90 | + mTag = NULL; | |
91 | +} | |
92 | + | |
93 | +int SP_ThreadPool :: getMaxThreads() | |
94 | +{ | |
95 | + return mMaxThreads; | |
96 | +} | |
97 | + | |
98 | +int SP_ThreadPool :: dispatch( DispatchFunc_t dispatchFunc, void *arg ) | |
99 | +{ | |
100 | + int ret = 0; | |
101 | + | |
102 | + sp_thread_attr_t attr; | |
103 | + SP_Thread_t * thread = NULL; | |
104 | + | |
105 | + sp_thread_mutex_lock( &mMainMutex ); | |
106 | + | |
107 | + for( ; mIndex <= 0 && mTotal >= mMaxThreads; ) { | |
108 | + sp_thread_cond_wait( &mIdleCond, &mMainMutex ); | |
109 | + } | |
110 | + | |
111 | + if( mIndex <= 0 ) { | |
112 | + SP_Thread_t * thread = ( SP_Thread_t * )malloc( sizeof( SP_Thread_t ) ); | |
113 | + memset( &thread->mId, 0, sizeof( thread->mId ) ); | |
114 | + sp_thread_mutex_init( &thread->mMutex, NULL ); | |
115 | + sp_thread_cond_init( &thread->mCond, NULL ); | |
116 | + thread->mFunc = dispatchFunc; | |
117 | + thread->mArg = arg; | |
118 | + thread->mParent = this; | |
119 | + | |
120 | + sp_thread_attr_init( &attr ); | |
121 | + sp_thread_attr_setdetachstate( &attr, SP_THREAD_CREATE_DETACHED ); | |
122 | + | |
123 | + if( 0 == sp_thread_create( &( thread->mId ), &attr, wrapperFunc, thread ) ) { | |
124 | + mTotal++; | |
125 | + sp_syslog( LOG_NOTICE, "[tp@%s] create thread#%ld\n", mTag, thread->mId ); | |
126 | + } else { | |
127 | + ret = -1; | |
128 | + sp_syslog( LOG_WARNING, "[tp@%s] cannot create thread\n", mTag ); | |
129 | + sp_thread_mutex_destroy( &thread->mMutex ); | |
130 | + sp_thread_cond_destroy( &thread->mCond ); | |
131 | + free( thread ); | |
132 | + } | |
133 | + sp_thread_attr_destroy( &attr ); | |
134 | + } else { | |
135 | + mIndex--; | |
136 | + thread = mThreadList[ mIndex ]; | |
137 | + mThreadList[ mIndex ] = NULL; | |
138 | + | |
139 | + thread->mFunc = dispatchFunc; | |
140 | + thread->mArg = arg; | |
141 | + thread->mParent = this; | |
142 | + | |
143 | + sp_thread_mutex_lock( &thread->mMutex ); | |
144 | + sp_thread_cond_signal( &thread->mCond ) ; | |
145 | + sp_thread_mutex_unlock ( &thread->mMutex ); | |
146 | + } | |
147 | + | |
148 | + sp_thread_mutex_unlock( &mMainMutex ); | |
149 | + | |
150 | + return ret; | |
151 | +} | |
152 | + | |
153 | +sp_thread_result_t SP_THREAD_CALL SP_ThreadPool :: wrapperFunc( void * arg ) | |
154 | +{ | |
155 | + SP_Thread_t * thread = ( SP_Thread_t * )arg; | |
156 | + | |
157 | + for( ; 0 == thread->mParent->mIsShutdown; ) { | |
158 | + thread->mFunc( thread->mArg ); | |
159 | + | |
160 | + if( 0 != thread->mParent->mIsShutdown ) break; | |
161 | + | |
162 | + sp_thread_mutex_lock( &thread->mMutex ); | |
163 | + if( 0 == thread->mParent->saveThread( thread ) ) { | |
164 | + sp_thread_cond_wait( &thread->mCond, &thread->mMutex ); | |
165 | + sp_thread_mutex_unlock( &thread->mMutex ); | |
166 | + } else { | |
167 | + sp_thread_mutex_unlock( &thread->mMutex ); | |
168 | + sp_thread_cond_destroy( &thread->mCond ); | |
169 | + sp_thread_mutex_destroy( &thread->mMutex ); | |
170 | + | |
171 | + free( thread ); | |
172 | + thread = NULL; | |
173 | + break; | |
174 | + } | |
175 | + } | |
176 | + | |
177 | + if( NULL != thread ) { | |
178 | + sp_thread_mutex_lock( &thread->mParent->mMainMutex ); | |
179 | + thread->mParent->mTotal--; | |
180 | + if( thread->mParent->mTotal <= 0 ) { | |
181 | + sp_thread_cond_signal( &thread->mParent->mEmptyCond ); | |
182 | + } | |
183 | + sp_thread_mutex_unlock( &thread->mParent->mMainMutex ); | |
184 | + } | |
185 | + | |
186 | + return 0; | |
187 | +} | |
188 | + | |
189 | +int SP_ThreadPool :: saveThread( SP_Thread_t * thread ) | |
190 | +{ | |
191 | + int ret = -1; | |
192 | + | |
193 | + sp_thread_mutex_lock( &mMainMutex ); | |
194 | + | |
195 | + if( mIndex < mMaxThreads ) { | |
196 | + mThreadList[ mIndex ] = thread; | |
197 | + mIndex++; | |
198 | + ret = 0; | |
199 | + | |
200 | + sp_thread_cond_signal( &mIdleCond ); | |
201 | + | |
202 | + if( mIndex >= mTotal ) { | |
203 | + sp_thread_cond_signal( &mFullCond ); | |
204 | + } | |
205 | + } | |
206 | + | |
207 | + sp_thread_mutex_unlock( &mMainMutex ); | |
208 | + | |
209 | + return ret; | |
210 | +} | |
211 | + | ... | ... |
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