please dont rip this site Prev Next

GlobalUnlock info  Overview  Group

The GlobalUnlock function decrements the lock count associated with a memory object that was allocated with the GMEM_MOVEABLE flag. This function has no effect on memory objects allocated with the GMEM_FIXED flag.

BOOL GlobalUnlock(

    HGLOBAL hMem 

// handle to the global memory object

   );

Parameters

hMem
Identifies the global memory object. This handle is returned by either the GlobalAlloc or GlobalReAlloc function.

Return Values

If the memory object is still locked after decrementing the lock count, the return value is a nonzero value.

If the function fails, the return value is zero. To get extended error information, call GetLastError. If GetLastError returns NO_ERROR, the memory object is unlocked.

Remarks

The internal data structures for each memory object include a lock count that is initially zero. For movable memory objects, the GlobalLock function increments the count by one, and GlobalUnlock decrements the count by one. For each call that a process makes to GlobalLock for an object, it must eventually call GlobalUnlock. Locked memory will not be moved or discarded, unless the memory object is reallocated by using the GlobalReAlloc function. The memory block of a locked memory object remains locked until its lock count is decremented to zero, at which time it can be moved or discarded.

Memory objects allocated with the GMEM_FIXED flag always have a lock count of zero. If the specified memory block is fixed memory, this function returns TRUE.

If the memory object is already unlocked, GlobalUnlock returns FALSE and GetLastError reports ERROR_NOT_LOCKED. Memory objects allocated with the LMEM_FIXED flag always have a lock count of zero and cause the ERROR_NOT_LOCKED error.

A process should not rely on the return value to determine the number of times it must subsequently call GlobalUnlock for a memory object.

See Also

GlobalAlloc, GlobalFlags, GlobalLock, GlobalReAlloc

See also:


file: /Techref/os/win/api/win32/func/src/f44_7.htm, 3KB, , updated: 2008/2/21 06:44, local time: 2022/5/17 06:51,
TOP NEW HELP FIND: 
34.204.174.110:LOG IN

 ©2022 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?
Please DO link to this page! Digg it! / MAKE!

<A HREF="http://www.piclist.com/techref/os/win/api/win32/func/src/f44_7.htm"> GlobalUnlock</A>

After you find an appropriate page, you are invited to your to this massmind site! (posts will be visible only to you before review) Just type a nice message (short messages are blocked as spam) in the box and press the Post button. (HTML welcomed, but not the <A tag: Instead, use the link box to link to another page. A tutorial is available Members can login to post directly, become page editors, and be credited for their posts.


Link? Put it here: 
if you want a response, please enter your email address: 
Attn spammers: All posts are reviewed before being made visible to anyone other than the poster.
Did you find what you needed?

  PICList 2022 contributors:
o List host: MIT, Site host massmind.org, Top posters @20220517
* Page Editors: James Newton, David Cary, and YOU!
* Roman Black of Black Robotics donates from sales of Linistep stepper controller kits.
* Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters.
* Monthly Subscribers: Gregg Rew. on-going support is MOST appreciated!
* Contributors: Richard Seriani, Sr.
 

Welcome to www.piclist.com!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .