please dont rip this site Prev Next

CreatePipe info  Overview  Group

The CreatePipe function creates an anonymous pipe, and returns handles to the read and write ends of the pipe.

BOOL CreatePipe(

    PHANDLE hReadPipe,

// address of variable for read handle

    PHANDLE hWritePipe,

// address of variable for write handle

    LPSECURITY_ATTRIBUTES lpPipeAttributes,

// pointer to security attributes

    DWORD nSize 

// number of bytes reserved for pipe

   );

Parameters

hReadPipe
Points to the variable that receives the read handle for the pipe.
hWritePipe
Points to the variable that receives the write handle for the pipe.
lpPipeAttributes
Pointer to a SECURITY_ATTRIBUTES structure that determines whether the returned handle can be inherited by child processes. If lpPipeAttributes is NULL, the handle cannot be inherited.

Windows NT: The lpSecurityDescriptor member of the structure specifies a security descriptor for the new pipe. If lpPipeAttributes is NULL, the pipe gets a default security descriptor.

Windows 95: The lpSecurityDescriptor member of the structure is ignored.

nSize
Specifies the buffer size for the pipe. The size is only a suggestion; the system uses the value to calculate an appropriate buffering mechanism. If this parameter is zero, the system uses the default buffer size.

Return Values

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

CreatePipe creates the pipe, assigning the specified pipe size to the storage buffer. CreatePipe also creates handles that the process uses to read from and write to the buffer in subsequent calls to the ReadFile and WriteFile functions.

To read from the pipe, a process uses the read handle in a call to the ReadFile function. ReadFile returns when one of the following is true: a write operation completes on the write end of the pipe, the number of bytes requested has been read, or an error occurs.

When a process uses WriteFile to write to an anonymous pipe, the write operation is not completed until all bytes are written. If the pipe buffer is full before all bytes are written, WriteFile does not return until another process or thread uses ReadFile to make more buffer space available.

See Also

ReadFile, SECURITY_ATTRIBUTES, WriteFile 


file: /Techref/os/win/api/win32/func/src/f10_13.htm, 4KB, , updated: 2000/4/7 12:19, local time: 2024/10/10 12:27,
TOP NEW HELP FIND: 
98.84.18.52:LOG IN
©2024 PLEASE DON'T RIP! THIS SITE CLOSES OCT 28, 2024 SO LONG AND THANKS FOR ALL THE FISH!

 ©2024 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://massmind.org/techref/os/win/api/win32/func/src/f10_13.htm"> CreatePipe</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?

 

Welcome to massmind.org!

 

Welcome to massmind.org!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .