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mdbx: rework mdbx_pread().

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This commit is contained in:
Leo Yuriev
2017-04-25 19:58:00 +03:00
parent aa59522dbe
commit 5ed0ccfcbb
2 changed files with 6 additions and 9 deletions
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13
src/osal.c
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@@ -337,19 +337,16 @@ int mdbx_pread(mdbx_filehandle_t fd, void *buf, size_t bytes, off_t offset) {
DWORD read = 0;
if (unlikely(!ReadFile(fd, buf, (DWORD)bytes, &read, &ov))) {
int rc = GetLastError();
if (rc == ERROR_HANDLE_EOF)
return (read == 0 && offset == 0) ? MDBX_ENODATA : ERROR_READ_FAULT;
return (rc == MDB_SUCCESS) ? /* paranoia */ ERROR_READ_FAULT : rc;
}
return (read == bytes) ? MDB_SUCCESS : ERROR_READ_FAULT;
#else
ssize_t read = pread(fd, buf, bytes, offset);
if (likely(bytes == (size_t)read))
return MDB_SUCCESS;
if (read < 0)
return errno;
return (read == 0 && offset == 0) ? MDBX_ENODATA : EIO;
if (read < 0) {
int rc = errno;
return (rc == MDB_SUCCESS) ? /* paranoia */ EIO : rc;
}
#endif
return (bytes == (size_t)read) ? MDB_SUCCESS : MDBX_ENODATA;
}
int mdbx_pwrite(mdbx_filehandle_t fd, const void *buf, size_t bytes,