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mdbx: добавление опции MDBX_CP_OVERWRITE в API копирования БД.

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Леонид Юрьев (Leonid Yuriev)
2025-07-10 21:55:12 +03:00
parent fa73f44ff0
commit ba6ce86d5f
4 changed files with 28 additions and 20 deletions
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32
src/osal.c
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@@ -1198,29 +1198,29 @@ MDBX_INTERNAL int osal_openfile(const enum osal_openfile_purpose purpose, const
break;
case MDBX_OPEN_DXB_OVERLAPPED_DIRECT:
FlagsAndAttributes |= FILE_FLAG_NO_BUFFERING;
/* fall through */
__fallthrough;
__fallthrough /* fall through */;
case MDBX_OPEN_DXB_OVERLAPPED:
FlagsAndAttributes |= FILE_FLAG_OVERLAPPED;
/* fall through */
__fallthrough;
__fallthrough /* fall through */;
case MDBX_OPEN_DXB_DSYNC:
CreationDisposition = OPEN_EXISTING;
DesiredAccess |= GENERIC_WRITE | GENERIC_READ;
FlagsAndAttributes |= FILE_FLAG_WRITE_THROUGH;
break;
case MDBX_OPEN_COPY:
CreationDisposition = CREATE_NEW;
ShareMode = 0;
DesiredAccess |= GENERIC_WRITE;
if (env->ps >= globals.sys_pagesize)
FlagsAndAttributes |= FILE_FLAG_NO_BUFFERING;
break;
case MDBX_OPEN_DELETE:
CreationDisposition = OPEN_EXISTING;
ShareMode |= FILE_SHARE_DELETE;
DesiredAccess = FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES | DELETE | SYNCHRONIZE;
break;
case MDBX_OPEN_COPY_EXCL:
CreationDisposition = CREATE_NEW;
__fallthrough /* fall through */;
case MDBX_OPEN_COPY_OVERWRITE:
ShareMode = 0;
DesiredAccess |= GENERIC_WRITE;
if (env->ps >= globals.sys_pagesize)
FlagsAndAttributes |= FILE_FLAG_NO_BUFFERING;
break;
}
*fd = CreateFileW(pathname, DesiredAccess, ShareMode, nullptr, CreationDisposition, FlagsAndAttributes, nullptr);
@@ -1260,9 +1260,6 @@ MDBX_INTERNAL int osal_openfile(const enum osal_openfile_purpose purpose, const
case MDBX_OPEN_DXB_LAZY:
flags |= O_RDWR;
break;
case MDBX_OPEN_COPY:
flags = O_CREAT | O_WRONLY | O_EXCL;
break;
case MDBX_OPEN_DXB_DSYNC:
flags |= O_WRONLY;
#if defined(O_DSYNC)
@@ -1276,9 +1273,14 @@ MDBX_INTERNAL int osal_openfile(const enum osal_openfile_purpose purpose, const
case MDBX_OPEN_DELETE:
flags = O_RDWR;
break;
case MDBX_OPEN_COPY_EXCL:
flags |= O_EXCL;
__fallthrough /* fall through */;
case MDBX_OPEN_COPY_OVERWRITE:
flags |= O_WRONLY;
}
const bool direct_nocache_for_copy = env->ps >= globals.sys_pagesize && purpose == MDBX_OPEN_COPY;
const bool direct_nocache_for_copy = env->ps >= globals.sys_pagesize && purpose >= MDBX_OPEN_COPY_EXCL;
if (direct_nocache_for_copy) {
#if defined(O_DIRECT)
flags |= O_DIRECT;