我正在使用aio_write它正在调试版本中工作但不在发布版本中。我已检查构造函数是否已初始化所有内容,并且我没有收到有关未初始化变量的任何警告。该类以16K块的形式收集要写入光盘的数据。如果数据小于16K,即使在发布版本中也可以。如果数据大于16K,则仅写入第一个块。 WriteBuffer :: ContinueWriteToFile无限期地返回WriteFileState_Active。
WriteBuffer_posix.h:
class WriteBufferPlatformData
{
public:
WriteBufferPlatformData();
~WriteBufferPlatformData();
aiocb aioData;
WriteBuffer::BufferVector::iterator currentBuffer;
};
WriteBuffer_posix.cpp:
WriteBufferPlatformData::WriteBufferPlatformData() :
aioData(),
currentBuffer()
{
memset(&aioData,0,sizeof(aioData));
aioData.aio_fildes=-1;
}
WriteBufferPlatformData::~WriteBufferPlatformData()
{
if (0<=aioData.aio_fildes) {
close(aioData.aio_fildes);
}
}
WriteBuffer::WriteFileState WriteBuffer::StartWriteToFile(const char * filename)
{
NYMPH_ASSERT(0>m_platformData->aioData.aio_fildes);
m_platformData->aioData.aio_fildes=open(filename,O_WRONLY|O_CREAT|O_TRUNC,S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
NYMPH_ASSERT2(0<=m_platformData->aioData.aio_fildes,"Could not open file for writing: %s (%d)",filename,errno);
if (0>m_platformData->aioData.aio_fildes) {
return WriteFileState_Failed;
}
if (m_buffers.empty()) {
close(m_platformData->aioData.aio_fildes);
m_platformData->aioData.aio_fildes=-1;
return WriteFileState_Complete;
}
m_isWriting=true;
m_platformData->currentBuffer=m_buffers.begin();
return ContinueWriteToFile();
}
WriteBuffer::WriteFileState WriteBuffer::ContinueWriteToFile()
{
NYMPH_ASSERT(0<=m_platformData->aioData.aio_fildes);
if (0!=m_platformData->aioData.aio_nbytes) {
int writeErrno=aio_error(&(m_platformData->aioData));
if (EINPROGRESS==writeErrno) {
return WriteFileState_Active;
}
NYMPH_ASSERT(aio_return(&(m_platformData->aioData))==m_platformData->aioData.aio_nbytes);
m_platformData->aioData.aio_nbytes=0;
++(m_platformData->currentBuffer);
if (m_buffers.end()==m_platformData->currentBuffer) {
close(m_platformData->aioData.aio_fildes);
m_platformData->aioData.aio_fildes=-1;
return WriteFileState_Complete;
}
}
if (0==m_platformData->aioData.aio_nbytes) {
m_platformData->aioData.aio_buf=*(m_platformData->currentBuffer);
if (m_buffers.back()==m_platformData->aioData.aio_buf) {
m_platformData->aioData.aio_nbytes=m_offset;
} else {
m_platformData->aioData.aio_nbytes=kBufferSize;
}
m_platformData->aioData.aio_offset=lseek(m_platformData->aioData.aio_fildes,0,SEEK_END);
if (0!=aio_write(&(m_platformData->aioData))) {
m_platformData->aioData.aio_nbytes=0;
NYMPH_ASSERT(EAGAIN==errno);
if (EAGAIN!=errno) {
close(m_platformData->aioData.aio_fildes);
m_platformData->aioData.aio_fildes=-1;
return WriteFileState_Failed;
}
}
}
return WriteFileState_Active;
}
答案 0 :(得分:0)
尽管我在手册页中已经阅读过,但似乎需要调用aio_return并更改NYMPH_ASSERT(aio_return ...到NYMPH_VERIFY(aio_return ...更正了问题。