17 Commits

Author	SHA1	Message	Date
Robert Watson	fa6fc5b819	Insert missing increment of (i) when walking the temporary semaphore ... vector during fork. Fix assertion which contained an off-by-one error. Submitted by: Antoine Brodin < antoine dot brodin at laposte dot net >	2005-02-25 21:00:14 +00:00
Robert Watson	590f242cc0	Add an exit hook, sem_forkhook(), which walks the list of POSIX semaphores ... owned by a process when it forks, and creates a matching set of references for the child process, as prescribed by POSIX. In order to avoid races with other threads in the parent process during fork(), it is necessary to allocate a temporary reference list while holding the sem_lock, then transfer those references to the new process once the sem_lock is released. The implementation is inefficient but appears functional; in order to improve the efficiency, it will be necessary to modify the existing structures and logic, which generally rely on O(n) operations over the global set of semaphores.	2005-02-25 19:10:51 +00:00
Robert Watson	955ec4156c	Assert sem_lock in id_to_sem() and sem_lookup_byname(), since these ... functions iterate over the global POSIX semaphore lists. MFC after: 3 days	2005-02-25 17:01:35 +00:00
Warner Losh	9454b2d864	/* -> /*- for copyright notices, minor format tweaks as necessary	2005-01-06 23:35:40 +00:00
Robert Watson	0fddf92d72	Assert the sem lock in sem_ref() and sem_rel(), as it is required to ... safely manipulate the reference count.	2004-12-23 02:22:47 +00:00
Poul-Henning Kamp	77409fe148	Add missing #include <sys/module.h>	2004-05-30 20:34:58 +00:00
Daniel Eischen	aae94fbbb6	Add ksem_timedwait() to complement ksem_wait(). ... Glanced at by: alfred	2004-02-03 05:08:32 +00:00
Robert Watson	679365e7b9	Reduce gratuitous includes: don't include jail.h if it's not needed. ... Presumably, at some point, you had to include jail.h if you included proc.h, but that is no longer required. Result of: self injury involving adding something to struct prison	2004-01-21 17:10:47 +00:00
David E. O'Brien	677b542ea2	Use __FBSDID().	2003-06-11 00:56:59 +00:00
John Baldwin	75b8b3b25c	Replace the at_fork, at_exec, and at_exit functions with the slightly more ... flexible process_fork, process_exec, and process_exit eventhandlers. This reduces code duplication and also means that I don't have to go duplicate the eventhandler locking three more times for each of at_fork, at_exec, and at_exit. Reviewed by: phk, jake, almost complete silence on arch@	2003-03-24 21:15:35 +00:00
John Baldwin	b254666064	Use td_ucred of curthread instead of p_ucred of curproc. This required ... changing sem_perm() and sem_hasopen() to take a thread instead of a proc for the first argument.	2003-03-20 21:12:31 +00:00
Warner Losh	a163d034fa	Back out M_* changes, per decision of the TRB. ... Approved by: trb	2003-02-19 05:47:46 +00:00
Alfred Perlstein	44956c9863	Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0. ... Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.	2003-01-21 08:56:16 +00:00
Alfred Perlstein	b3890a1c42	make sem_leave return a usable errno instead of -1. ... make ksem_close return that usable errno instead of -1 (ERESTART). PR: 46957	2003-01-10 23:13:16 +00:00
Poul-Henning Kamp	c3053131ca	Be consistent about funtions being static. ... Spotted by: FlexeLint	2002-10-16 10:42:13 +00:00
Alfred Perlstein	c814aa3fdb	disable debug output by default.	2002-10-07 04:13:21 +00:00
Alfred Perlstein	efaa658806	Bring in my implementation of kernel support for posix realtime semaphores ... that are shareable between processes. There will be a cleanup shortly along with the necessary changes made to libc, libc_r, libpthread as well as the hooks into sys/conf and sys/modules.	2002-09-18 22:47:42 +00:00