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* To be consistent, use the __weak_reference macro from <sys/cdefs.h>deischen2001-04-101-4/+4
| | | | | | instead of #pragma weak to create weak definitions. Suggested by: bde
* Add weak definitions for wrapped system calls. In general:deischen2001-01-241-23/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | _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
* -Wall and minor style(9) cleanups.deischen1999-12-281-1/+1
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* $Id$ -> $FreeBSD$peter1999-08-281-1/+1
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* Add RCS IDs to those files without them.deischen1999-08-051-1/+2
| | | | | | | Fix copyrights (s/REGENTS/AUTHOR). Suggested by: tg Approved by: jb
* - Fixed bug where we NULL'd before we freed the data causing a memory leak.nate1999-05-141-1/+1
| | | | | Submitted by: Ralf S. Engelschall Obtained from: PR i386/11713
* NULL a pointer after it is freed to avoid trying to free it again.jb1998-09-301-0/+2
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* Implement compile time debug support instead of tracking file name andjb1998-06-091-22/+17
| | | | | | | line number every time a file descriptor is locked. This looks like a big change but it isn't. It should reduce the size of libc_r and make it run slightly faster.
* Simplify the handling of thread specific data. Only track if a keyjb1998-06-061-45/+33
| | | | | | is allocated or not, rather than keeping a count and attempting to know it it is in-use. POSIX says that once a key is deleted, using the key again results in undefined behaviour.
* Remove some stale code.jb1998-05-311-1/+1
| | | | Pointed out by: Amancio
* Change signal model to match POSIX (i.e. one set of signal handlersjb1998-04-291-66/+44
| | | | | | | | | | | | | | | | | | | | 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!
* Modify the return values to comply with POSIX. Previously thesealex1997-11-251-1/+0
| | | | | | functions would return -1 and set errno to indicate the specific error. POSIX requires that the functions return the error code as the return value of the function instead.
* Submitted by: John Birrelljulian1997-02-051-1/+1
| | | | uthreads update from the author.
* Make pthread_getspecific() compliant with the final IEEE pthreadshsu1996-11-111-9/+9
| | | | specification: return parameter passing changed.
* Submitted by: John Birrell <cimaxp1!jb@werple.net.au>julian1996-08-201-10/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Here are the diffs for libc_r to get it one step closer to P1003.1c These make most of the thread/mutex/condvar structures opaque to the user. There are three functions which have been renamed with _np suffixes because they are extensions to P1003.1c (I did them for JAVA, which needs to suspend/resume threads and also start threads suspended). I've created a new header (pthread_np.h) for the non-POSIX stuff. The egrep tags stuff in /usr/src/lib/libc_r/Makefile that I uncommented doesn't work. I think its best to delete it. I don't think libc_r needs tags anyway, 'cause most of the source is in libc which does have tags. also: Here's the first batch of man pages for the thread functions. The diff to /usr/src/lib/libc_r/Makefile removes some stuff that was inherited from /usr/src/lib/libc/Makefile that should only be done with libc. also: I should have sent this diff with the pthread(3) man page. It allows people to type make -DWANT_LIBC_R world to get libc_r built with the rest of the world. I put this in the pthread(3) man page. The default is still not to build libc_r. also: The diff attached adds a pthread(3) man page to /usr/src/share/man/man3. The idea is that without libc_r installed, this man page will give people enough info to know that they have to build libc_r.
* Reviewed by: julianjulian1996-01-221-0/+237
Submitted by: john birrel One version of the pthreads library another will follow with differnt actions under some cases.. not QUITE complete
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