static couch_file_handle couch_constructor(couchstore_error_info_t *errinfo,
void* cookie)
{
(void) cookie;
/* We don't have a file descriptor till couch_open runs,
so return an invalid value for now. */
return handle_to_win(INVALID_HANDLE_VALUE);
}
static off_t couch_goto_eof(couch_file_handle handle)
{
HANDLE file = handle_to_win(handle);
LARGE_INTEGER size;
if(!GetFileSizeEx(file, &size)) {
save_windows_error();
return (off_t) COUCHSTORE_ERROR_READ;
}
return size.QuadPart;
}
static couchstore_error_t couch_sync(couch_file_handle handle)
{
HANDLE file = handle_to_win(handle);
if (!FlushFileBuffers(file)) {
save_windows_error();
return COUCHSTORE_ERROR_WRITE;
}
return COUCHSTORE_SUCCESS;
}
static ssize_t couch_pread(couch_file_handle handle, void *buf, size_t nbyte, off_t offset)
{
#ifdef LOG_IO
fprintf(stderr, "PREAD %8llx -- %8llx (%6.1f kbytes)\n", offset, offset+nbyte, nbyte/1024.0);
#endif
HANDLE file = handle_to_win(handle);
BOOL rv;
DWORD bytesread;
OVERLAPPED winoffs;
memset(&winoffs, 0, sizeof(winoffs));
winoffs.Offset = offset & 0xFFFFFFFF;
winoffs.OffsetHigh = offset >> 32;
rv = ReadFile(file, buf, nbyte, &bytesread, &winoffs);
if(!rv) {
return (ssize_t) COUCHSTORE_ERROR_READ;
}
return bytesread;
}
static ssize_t couch_pwrite(couch_file_handle handle, const void *buf, size_t nbyte, off_t offset)
{
#ifdef LOG_IO
fprintf(stderr, "PWRITE %8llx -- %8llx (%6.1f kbytes)\n", offset, offset+nbyte, nbyte/1024.0);
#endif
HANDLE file = handle_to_win(handle);
BOOL rv;
DWORD byteswritten;
OVERLAPPED winoffs;
memset(&winoffs, 0, sizeof(winoffs));
winoffs.Offset = offset & 0xFFFFFFFF;
winoffs.OffsetHigh = offset >> 32;
rv = WriteFile(file, buf, nbyte, &byteswritten, &winoffs);
if(!rv) {
save_windows_error();
return (ssize_t) COUCHSTORE_ERROR_WRITE;
}
return byteswritten;
}
static void couch_close(couch_file_handle handle)
{
HANDLE file = handle_to_win(handle);
CloseHandle(handle);
}
static couch_file_handle couch_constructor(void* cookie)
{
(void) cookie;
// We don't have a file descriptor till couch_open runs, so return an invalid value for now.
return handle_to_win(INVALID_HANDLE_VALUE);
}
static void couch_close(couchstore_error_info_t *errinfo,
couch_file_handle handle)
{
HANDLE file = handle_to_win(handle);
CloseHandle(handle);
}