异步线程

Question

我在C中有两个函数，它们将由c ++线程调用（每个函数一个线程）。我希望阻止一个，当另一个正在运行时，反之亦然。我该如何解决这个问题？

这里是简历：

int adin_mem_read(SP16 *buf, int sampnum, int client_id){

//(.....)
//lock writing_buffer
memcpy(&buf[real_size], stream_buffer_[client_id].data_ + stream_buffer_[client_id].p_read, stream_buffer_[client_id].p_write - stream_buffer_[client_id].p_read);
//unlock writing_buffer
//(....)
}

和

int writing_bufer(struct Stream_Bufer * buffers, const char *data, int nbytes, int end_stream, int begin_stream) {

//(...)
//lock adin_mem_read()
memcpy(buffers->data_ + buffers->p_write, data, nbytes);
buffers->p_write += nbytes;
//(...)
//unlock adin_mem_read()

}