File size: 1,757 Bytes
21caab1 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | #include <windows.h>
#include "memory.h"
#include "queue.h"
void _que_initialize(QUEUE* queue, INT size) {
queue->queue_size = size;
queue->buffer = (WCHAR**)_halloc(size * sizeof(WCHAR*));
queue->space_avail = CreateSemaphoreA(NULL, size, size, NULL);
queue->data_avail = CreateSemaphoreA(NULL, 0, size, NULL);
queue->in_pos = 0;
queue->out_pos = 0;
InitializeCriticalSection(&(queue->mutex));
}
int _que_push(QUEUE* queue, LPWSTR data, int wait) {
if (WaitForSingleObject(queue->space_avail, 0) != WAIT_OBJECT_0) {
if (wait) WaitForSingleObject(queue->space_avail, INFINITE);
else return 0;
}
EnterCriticalSection(&(queue->mutex));
WCHAR* realloced_str = 0;
if (data)
{
int memSize = sizeof(WCHAR) * (lstrlenW(data) + 1);
realloced_str = (WCHAR*)_halloc(memSize);
_memcpy(realloced_str, data, memSize);
}
queue->buffer[queue->in_pos] = realloced_str;
queue->in_pos = (queue->in_pos + 1) % queue->queue_size;
LeaveCriticalSection(&queue->mutex);
ReleaseSemaphore(queue->data_avail, 1, NULL);
return 1;
}
LPWSTR _que_pop(QUEUE* queue, int wait, int* dwError) {
*dwError = 0;
if (WaitForSingleObject(queue->data_avail, 0) != WAIT_OBJECT_0) {
if (wait) WaitForSingleObject(queue->data_avail, INFINITE);
else {
*dwError = QUEUE_ERR_TIMEOUT;
return 0;
}
}
EnterCriticalSection(&queue->mutex);
LPWSTR retval = queue->buffer[queue->out_pos];
queue->out_pos = (queue->out_pos + 1) % queue->queue_size;
LeaveCriticalSection(&queue->mutex);
ReleaseSemaphore(queue->space_avail, 1, NULL);
return retval;
} |