使用alsa的函数snd_pcm_writei,我可以立即释放样本缓冲区吗?

呼叫后使用ALSA播放音频 snd_uuu pcm_uuu写入 ,我是否可以立即释放声音样本缓冲区,或者是否需要等到声音播放完毕后才能释放样本缓冲区?

例如:

unsigned short *buffer;

buffer = malloc(size of sample to play);
...load data into buffer...
snd_pcm_writei (playback_handle, buffer, size of sample)
free(buffer)