proc_open_bug51800.phpt - OpenGrok history log for /PHP-5.6/ext/standard/tests/streams/proc_open

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# 91d3cd85	29-Sep-2014	Anatol Belski	better test cleanup and even force the XFAIL to fail as it would take too long anyway, even if it passes
# 0c982798	29-Sep-2014	Anatol Belski	Fixed bug #51800 proc_open on Windows hangs forever This loop can block for some minutes, theoretically. Practially however, this is a 99% non issue for a normal use case. This is re Fixed bug #51800 proc_open on Windows hangs forever This loop can block for some minutes, theoretically. Practially however, this is a 99% non issue for a normal use case. This is required because read() is synchronous. The PHP streams API wants to fill its internal buffers, therefore it might try to read some more data than user has demanded. Also, for a case where we want to read X bytes, but neither enough data nor EOF arrives, read() will block until it could fill the buffer. If a counterpart station runs slowly or delivers not all the data at once, read() would still be waiting. If we quit too early, we possibly could loose some data from the pipe. Thus it has to emulate the read() behaviour, but obviously not completely, just to some grade. Reading big data amount is for sure an issue on any platforms, it depends on the pipe buffer size, which is controlled by the system. On Windows, the buffer size seems to be way too small, which causes buffer congestion and a dead lock. It is essential to read the pipe descriptors simultaneously and possibly in the same order as the opposite writes them. Thus, this will work with smaller buffer data sizes passed through pipes. As MSDN states, anonymous pipes don't support asynchronous operations. Neither anonymous pipes do support select() as they are not SOCKETs but file descriptors. Consequently - bigger data sizes will need a better solution based on threads. However it is much more expencive. Maybe a better solution could be exporting a part of the internal doing as a userspace function which could perform some kind of lookahead operation on the pipe descriptor. This is just the first stone, depending on the user feedback we might go for further improvements in this area. show more ...