Я использую aio_write, он работает в отладочной сборке, но не в выпуске.Я проверил конструктор, что все инициализировано, и я не получаю никаких предупреждений о неинициализированных переменных.Класс собирает данные, которые должны быть записаны на диск, по 16 тыс. Блоков.Если размер данных меньше 16 КБ, он работает даже в сборках выпуска.Если данные больше 16K, записывается только первый блок.WriteBuffer :: ContinueWriteToFile возвращает WriteFileState_Active неограниченно.
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;
}