Bug #79566 [Com]: Private SHM is not private on Windows

Edit report at https://bugs.php.net/bug.php?id=79566&edit=1 ID: 79566 Comment by: albertareed1988 at gmail dot com Reported by: cmb@php.net Summary: Private SHM is not private on Windows Status: Closed Type: Bug Package: *Extensibility Functions Operating System: Windows only PHP Version: 7.3Git-2020-05-05 (Git) Assigned To: cmb Block user comment: N Private report: N New Comment: Thanks for the info i will try to figure it out for more https://www.myaarpmedicare.rocks/ Previous Comments: ------------------------------------------------------------------------ [2020-05-05 09:42:19] cmb@php.net Automatic comment on behalf of cmbecker69@gmx.de Revision: http://git.php.net/?p=php-src.git;a=commit;h=f33cf52faf733f5a6441a533f83e9b1cf2018245 Log: Fix #79566: Private SHM is not private on Windows ------------------------------------------------------------------------ [2020-05-05 09:35:25] cmb@php.net The following pull request has been associated: Patch Name: Support shmget(IPC_PRIVATE, …) on Windows On GitHub: https://github.com/php/php-src/pull/5519 Patch: https://github.com/php/php-src/pull/5519.patch ------------------------------------------------------------------------ [2020-05-05 09:31:21] cmb@php.net Description: ------------ Calling shmop_open() with a $key that matches IPC_PRIVATE (which is usually zero on POSIX, and always zero on Windows), creates private shared memory on POSIX, but not on Windows. This is actually not particularly related to ext/shmop, but rather to our Windows emulation layer for XSI shared memory (shmget() and friends), so all extensions which use that functionality to create private SHM are affected by this. For instance, APCu[1]. [1] <https://github.com/krakjoe/apcu/issues/394> Test script: --------------- <?php $write = 'test'; $shm1 = shmop_open(0, 'c', 0777, 1024); shmop_write($shm1, $write, 0); $shm2 = shmop_open(0, 'c', 0777, 1024); $read = shmop_read($shm2, 0, 4); var_dump(is_string($read) && $read !== $write); shmop_close($shm1); shmop_close($shm2); ?> Expected result: ---------------- bool(true) Actual result: -------------- bool(false) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79566&edit=1