98 lines
2.0 KiB
C
98 lines
2.0 KiB
C
/*
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* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the GNU Affero General Public License, version 3
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* or later ("AGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "tdbOs.h"
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#ifndef TDB_FOR_TDENGINE
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// tdbOsRead
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i64 tdbOsRead(tdb_fd_t fd, void *pData, i64 nBytes) {
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i64 nRead = 0;
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i64 iRead = 0;
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u8 *pBuf = (u8 *)pData;
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while (nBytes > 0) {
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iRead = read(fd, pBuf, nBytes);
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if (iRead < 0) {
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if (errno == EINTR) {
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continue;
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} else {
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return -1;
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}
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} else if (iRead == 0) {
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break;
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}
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nRead += iRead;
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pBuf += iRead;
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nBytes -= iRead;
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}
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return nRead;
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}
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// tdbOsPRead
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i64 tdbOsPRead(tdb_fd_t fd, void *pData, i64 nBytes, i64 offset) {
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i64 nRead = 0;
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i64 iRead = 0;
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i64 iOffset = offset;
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u8 *pBuf = (u8 *)pData;
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while (nBytes > 0) {
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iRead = pread(fd, pBuf, nBytes, iOffset);
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if (iRead < 0) {
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if (errno == EINTR) {
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continue;
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} else {
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return -1;
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}
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} else if (iRead == 0) {
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break;
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}
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nRead += iRead;
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pBuf += iRead;
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iOffset += iRead;
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nBytes -= iRead;
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}
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return nRead;
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}
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// tdbOsWrite
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i64 tdbOsWrite(tdb_fd_t fd, const void *pData, i64 nBytes) {
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i64 nWrite = 0;
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i64 iWrite = 0;
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u8 *pBuf = (u8 *)pData;
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while (nBytes > 0) {
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iWrite = write(fd, pBuf, nBytes);
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if (iWrite < 0) {
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if (errno == EINTR) {
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continue;
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}
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return -1;
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}
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nWrite += iWrite;
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pBuf += iWrite;
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nBytes -= iWrite;
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}
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return nWrite;
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}
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#endif |