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Added notes about locking functions.

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This commit is contained in:
Ilia Alshanetsky 2003-03-04 21:46:33 +00:00
parent cf7101d354
commit 6efd9ea5c4
1 changed files with 7 additions and 1 deletions
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8
README.STREAMS
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@ -37,9 +37,10 @@ PHPAPI int php_stream_close(php_stream * stream);
PHPAPI int php_stream_flush(php_stream * stream);
PHPAPI int php_stream_seek(php_stream * stream, off_t offset, int whence);
PHPAPI off_t php_stream_tell(php_stream * stream);
PHPAPI int php_stream_lock(php_stream * stream, int mode);
These (should) behave in the same way as the ANSI stdio functions with similar
names: fread, fwrite, fprintf, feof, fgetc, fgets, fclose, fflush, fseek, ftell.
names: fread, fwrite, fprintf, feof, fgetc, fgets, fclose, fflush, fseek, ftell, flock.
Opening Streams
===============
@ -157,6 +158,11 @@ can lead to a crash when the resource is later used/released.
NOTE: If you are opening a stream and need it to be seekable, use the
STREAM_MUST_SEEK option to php_stream_open_wrapper();
PHPAPI int php_stream_supports_lock(php_stream * stream);
This function will return either 1 (success) or 0 (failure) indicating whether or
not a lock can be set on this stream. Typically you can only set locks on stdio streams.
Casting Streams
===============
What if your extension needs to access the FILE* of a user level file pointer?