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Lock/Unlock functions #31

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Lock/Unlock functions #31

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24 changes: 24 additions & 0 deletions winapi/file.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,22 @@ BOOL ReadFile(
LPOVERLAPPED lpOverlapped
);

BOOL LockFile(
HANDLE hFile,
DWORD dwFileOffsetLow,
DWORD dwFileOffsetHigh,
DWORD nNumberOfBytesToLockLow,
DWORD nNumberOfBytesToLockHigh
);

BOOL UnlockFile(
HANDLE hFile,
DWORD dwFileOffsetLow,
DWORD dwFileOffsetHigh,
DWORD nNumberOfBytesToUnlockLow,
DWORD nNumberOfBytesToUnlockHigh
);

BOOL FlushFileBuffers(HANDLE hFile);
]]

Expand Down Expand Up @@ -97,6 +113,14 @@ function FlushFileBuffers(hfile)
return retnz(C.FlushFileBuffers(hfile))
end

function LockFile(hfile, offsetLow, offsetHigh, bytesLow, bytesHigh)
return retnz(C.LockFile(hfile, offsetLow, offsetHigh, bytesLow, bytesHigh))
end

function UnlockFile(hfile, offsetLow, offsetHigh, bytesLow, bytesHigh)
return retnz(C.UnlockFile(hfile, offsetLow, offsetHigh, bytesLow, bytesHigh))
end

if not ... then
local tmpname = '_CreateFileTest.tmp'
local f = assert(CreateFile(tmpname, 'GENERIC_WRITE', 0, nil,
Expand Down