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* Make these functions cancellation points like they should be:Archie Cobbs2002-05-021-1/+13
| | | | | | | | | | | poll(2), readv(2), select(2), wait4(2), writev(2). PR: bin/37658 Reviewed by: deischen MFC after: 1 week Notes: svn path=/head/; revision=95948
* To be consistent, use the __weak_reference macro from <sys/cdefs.h>Daniel Eischen2001-04-101-1/+1
| | | | | | | | | instead of #pragma weak to create weak definitions. Suggested by: bde Notes: svn path=/head/; revision=75369
* Add weak definitions for wrapped system calls. In general:Daniel Eischen2001-01-241-7/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | _foo - wrapped system call foo - weak definition to _foo and for cancellation points: _foo - wrapped system call __foo - enter cancellation point, call _foo(), leave cancellation point foo - weak definition to __foo Change use of global _thread_run to call a function to get the currently running thread. Make all pthread_foo functions weak definitions to _pthread_foo, where _pthread_foo is the implementation. This allows an application to provide its own pthread functions. Provide slightly different versions of pthread_mutex_lock and pthread_mutex_init so that we can tell the difference between a libc mutex and an application mutex. Threads holding mutexes internal to libc should never be allowed to exit, call signal handlers, or cancel. Approved by: -arch Notes: svn path=/head/; revision=71581
* #include <sys/types.h>Brian Somers2000-10-151-0/+2
| | | | Notes: svn path=/head/; revision=67171
* Use __strong_reference() instead of __weak_reference() to assure that theJason Evans2000-01-291-1/+1
| | | | | | | weak symbols of the same name are not used. Notes: svn path=/head/; revision=56888
* Simplify sytem call renaming. Instead of _foo() <-- _libc_foo <-- foo(),Jason Evans2000-01-271-4/+2
| | | | | | | | | | | | | | | | | | | | just use _foo() <-- foo(). In the case of a libpthread that doesn't do call conversion (such as linuxthreads and our upcoming libpthread), this is adequate. In the case of libc_r, we still need three names, which are now _thread_sys_foo() <-- _foo() <-- foo(). Convert all internal libc usage of: aio_suspend(), close(), fsync(), msync(), nanosleep(), open(), fcntl(), read(), and write() to _foo() instead of foo(). Remove all internal libc usage of: creat(), pause(), sleep(), system(), tcdrain(), wait(), and waitpid(). Make thread cancellation fully POSIX-compliant. Suggested by: deischen Notes: svn path=/head/; revision=56698
* Track libc's three-tier symbol naming. libc_r must currently implementJason Evans2000-01-121-1/+3
| | | | | | | | the _libc_*() entry points and add *() weak aliases. This will all change for the better when libc_r becomes libpthread. Notes: svn path=/head/; revision=55838
* Fixes for signal handling:Daniel Eischen1999-12-171-1/+1
| | | | | | | | | | | | | | | | | o Don't call signal handlers with the signal handler access lock held. o Remove pending signals before calling signal handlers. If pending signals were not removed prior to handling them, invocation of the handler could cause the handler to be called more than once for the same signal. Found by: JB o When SIGCHLD arrives, wake up all threads in PS_WAIT_WAIT (wait4). PR: bin/15328 Reviewed by: jasone Notes: svn path=/head/; revision=54707
* add pthread_cancel, obtained from OpenBSD.Alfred Perlstein1999-11-281-0/+2
| | | | | | | | | | | | | | | | | eischen (Daniel Eischen) added wrappers to protect against cancled threads orphaning internal resources. the cancelability code is still a bit fuzzy but works for test programs of my own, OpenBSD's and some examples from ORA's books. add readdir_r to both libc and libc_r add some 'const' attributes to function parameters Reviewed by: eischen, jasone Notes: svn path=/head/; revision=53812
* $Id$ -> $FreeBSD$Peter Wemm1999-08-281-1/+1
| | | | Notes: svn path=/head/; revision=50476
* Add RCS IDs to those files without them.Daniel Eischen1999-08-051-1/+2
| | | | | | | | | | Fix copyrights (s/REGENTS/AUTHOR). Suggested by: tg Approved by: jb Notes: svn path=/head/; revision=49439
* Defer signals, so we will not wait for SIGCHLD after it was delivered.Dmitrij Tejblum1999-06-291-0/+5
| | | | Notes: svn path=/head/; revision=48349
* Change signal model to match POSIX (i.e. one set of signal handlersJohn Birrell1998-04-291-6/+6
| | | | | | | | | | | | | | | | | | | | | | | for the process, not a separate set for each thread). By default, the process now only has signal handlers installed for SIGVTALRM, SIGINFO and SIGCHLD. The thread kernel signal handler is installed for other signals on demand. This means that SIG_IGN and SIG_DFL processing is now left to the kernel, not the thread kernel. Change the signal dispatch to no longer use a signal thread, and call the signal handler using the stack of the thread that has the signal pending. Change the atomic lock method to use test-and-set asm code with a yield if blocked. This introduces separate locks for each type of object instead of blocking signals to prevent a context switch. It was this blocking of signals that caused the performance degradation the people have noted. This is a *big* change! Notes: svn path=/head/; revision=35509
* Reviewed by: julianJulian Elischer1996-01-221-0/+61
Submitted by: john birrel One version of the pthreads library another will follow with differnt actions under some cases.. not QUITE complete Notes: svn path=/head/; revision=13546
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