MprSelectService Class Reference
List of all members.
Detailed DescriptionManage system select() call and the set of I/O handles.
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Public Member Functions
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| int |
getFds (fd_set *readInterest, fd_set *writeInterest, fd_set *exceptInterest, int *maxFd, int *lastGet)
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| void |
serviceIO (int sockFd, int winMask)
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| void |
serviceIO (int readyFds, fd_set *readFds, fd_set *writeFds, fd_set *exceptFds)
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Member Function Documentation
| int MprSelectService::getFds |
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fd_set * |
readInterest, |
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fd_set * |
writeInterest, |
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fd_set * |
exceptInterest, |
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int * |
maxFd, |
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int * |
lastGet |
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- Synopsis:
- Get the select file masks for all MPR file and sockets.
- Overview:
- The getFds call set the select I/O masks for all files and sockets in use by the MPR. Application event loops should call getFds and then OR in their own file descriptors before calling select using the masks. getFds will only modify the masks if the I/O interests of underlying file descriptors have changed. This means that getFds may not modify the masks if nothing much has changed. It is imperative that you not clear the masks between calls to getFds. Consequently, you should copy or save the masks before using them in select -- as select will modify the masks. If you want to force getFds to rebuild the masks, zero the value pointed to by the lastGet parameter.
- Parameters:
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readInterest |
fd_set read interest mask |
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writeInterest |
fd_set write interest mask |
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exceptInterest |
Not used |
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maxFd |
Number of the highest file descriptor plus 1. This value is used by select. |
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lastGet |
Pointer to a timestamp integer used by getFds to manage when getFds was last run. The value pointed to should be initialized to -1. |
- Returns:
- Returns TRUE if the masks were modified.
- Stability classification:
- Evolving.
- Library:
- libappWeb
- See also:
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Mpr, getIdleTime, runTasks, runTimers
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| void MprSelectService::serviceIO |
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int |
sockFd, |
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int |
winMask |
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- Synopsis:
- Service any pending I/O events for a given socket (Windows)
- Overview:
- serviceIO service the I/O event specified in winMask for the given socket.
- Parameters:
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sockFd |
Socket descriptor |
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winMask |
Windows Message I/O mask |
- Stability classification:
- Evolving.
- Library:
- libappWeb
- See also:
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Mpr, getIdleTime, runTasks, runTimers, getFds
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| void MprSelectService::serviceIO |
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int |
readyFds, |
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fd_set * |
readFds, |
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fd_set * |
writeFds, |
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fd_set * |
exceptFds |
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- Synopsis:
- Service any pending I/O events
- Overview:
- serviceIO will analyse the provided select masks and will call all registered select handlers if an I/O event has occurred for that handler. MprSocket automatically creates select handlers on Unix and so the socket handlers will be also invoked if an I/O event occurs. This routine call be called on Windows, but the native windows message mechanism will provide higher throughput.
- Parameters:
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readyFds |
Number of file descriptors with I/O events |
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readFds |
Read select mask |
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writeFds |
Write select mask |
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exceptFds |
Exception select mask |
- Stability classification:
- Evolving.
- Library:
- libappWeb
- See also:
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Mpr, getIdleTime, runTasks, runTimers, getFds
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The documentation for this class was generated from the following files:
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