66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
#include "tsmpool.h"
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tsmpool::tsmpool(size_t size, int num) :
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size(size),
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num(num) //number of buffers of (size) to alloc
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{
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this->threads_cntr = 0;
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this->ok = 1;
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this->lowest_read_index = -1;
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this->write_index = 0;
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this->my_read_index = index_before(0);
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if (pthread_mutex_init(&this->mutex, NULL) != 0) { this->ok = 0; return; }
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for(int i=0; i<num; i++)
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{
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void* newptr = (void*)new char[size];
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if(!newptr) { this->ok = 0; return; }
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buffers.push_back(newptr);
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}
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}
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int tsmpool::is_ok() { return this->ok; }
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void* tsmpool::get_write_buffer()
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{
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//if(write_index==index_before(lowest_read_index)) return NULL;
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pthread_mutex_lock(&this->mutex);
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void* to_return = buffers[write_index];
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write_index = index_next(write_index);
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pthread_mutex_unlock(&this->mutex);
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return to_return;
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}
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tsmthread_t* tsmpool::register_thread()
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{
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if(!ok) return NULL;
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pthread_mutex_lock(&this->mutex);
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tsmthread_t* thread = new tsmthread_t();
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thread->read_index = index_before(write_index);
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threads.push_back(thread);
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pthread_mutex_unlock(&this->mutex);
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return thread;
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}
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int tsmpool::remove_thread(tsmthread_t* thread)
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{
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pthread_mutex_lock(&this->mutex);
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for(int i=0;i<threads.size();i++)
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if(threads[i] == thread)
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{
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delete threads[i];
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threads.erase(threads.begin()+i);
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break;
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}
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pthread_mutex_unlock(&this->mutex);
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}
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void* tsmpool::get_read_buffer(tsmthread_t* thread)
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{
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pthread_mutex_lock(&this->mutex);
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int* actual_read_index = (thread==NULL) ? &my_read_index : &thread->read_index;
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if(*actual_read_index==index_before(write_index)) return NULL;
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void* to_return = buffers[*actual_read_index];
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*actual_read_index=index_next(*actual_read_index);
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pthread_mutex_unlock(&this->mutex);
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return to_return;
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}
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