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303975 |
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11-Aug-2016 |
gjb |
Copy stable/11@r303970 to releng/11.0 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, and rename it to RC1.
Update __FreeBSD_version.
Use the quarterly branch for the default FreeBSD.conf pkg(8) repo and the dvd1.iso packages population.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation |
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302408 |
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08-Jul-2016 |
gjb |
Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle. Prune svn:mergeinfo from the new branch, as nothing has been merged here.
Additional commits post-branch will follow.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation
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#
300043 |
|
17-May-2016 |
kib |
Add implementation of robust mutexes, hopefully close enough to the intention of the POSIX IEEE Std 1003.1TM-2008/Cor 1-2013.
A robust mutex is guaranteed to be cleared by the system upon either thread or process owner termination while the mutex is held. The next mutex locker is then notified about inconsistent mutex state and can execute (or abandon) corrective actions.
The patch mostly consists of small changes here and there, adding neccessary checks for the inconsistent and abandoned conditions into existing paths. Additionally, the thread exit handler was extended to iterate over the userspace-maintained list of owned robust mutexes, unlocking and marking as terminated each of them.
The list of owned robust mutexes cannot be maintained atomically synchronous with the mutex lock state (it is possible in kernel, but is too expensive). Instead, for the duration of lock or unlock operation, the current mutex is remembered in a special slot that is also checked by the kernel at thread termination.
Kernel must be aware about the per-thread location of the heads of robust mutex lists and the current active mutex slot. When a thread touches a robust mutex for the first time, a new umtx op syscall is issued which informs about location of lists heads.
The umtx sleep queues for PP and PI mutexes are split between non-robust and robust.
Somewhat unrelated changes in the patch: 1. Style. 2. The fix for proper tdfind() call use in umtxq_sleep_pi() for shared pi mutexes. 3. Removal of the userspace struct pthread_mutex m_owner field. 4. The sysctl kern.ipc.umtx_vnode_persistent is added, which controls the lifetime of the shared mutex associated with a vnode' page.
Reviewed by: jilles (previous version, supposedly the objection was fixed) Discussed with: brooks, Martin Simmons <martin@lispworks.com> (some aspects) Tested by: pho Sponsored by: The FreeBSD Foundation
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#
296162 |
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28-Feb-2016 |
kib |
Implement process-shared locks support for libthr.so.3, without breaking the ABI. Special value is stored in the lock pointer to indicate shared lock, and offline page in the shared memory is allocated to store the actual lock.
Reviewed by: vangyzen (previous version) Discussed with: deischen, emaste, jhb, rwatson, Martin Simmons <martin@lispworks.com> Tested by: pho Sponsored by: The FreeBSD Foundation
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#
281130 |
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06-Apr-2015 |
pfg |
Make use of gcc attributes in some standard include headers.
The `nonnull' attribute specifies that some function parameters should be non-null pointers. This is very useful as it helps the compiler generate warnings on suspicious code and can also enable some small optimizations.
Also start using 'alloc_size' attribute in the allocator functions.
This is an initial step to better integrate our libc with the compiler: these attributes are fully supported by clang and they are also useful for the static analyzer.
Note that due to some bogus internal procedure in the way gcc ports are built they may require updating if they were built before r280801.
Relnotes: yes Hinted by: Android's bionic libc Differential Revision: https://reviews.freebsd.org/D2107
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280820 |
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29-Mar-2015 |
pfg |
Clean some spaces vs tabs.
No, this file doesn't conform with KNF at all.
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280636 |
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25-Mar-2015 |
pfg |
Temporarily revert 280458.
GCC is still carries an old version of cdefs.h which doesn't accept multiple parameters for the nonnull attribute.
Since this issue probably affects many ports in the tree we will revert it for now until gcc gets fixed.
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280458 |
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24-Mar-2015 |
pfg |
Introduce nonnull attributes in the signal and pthread headers.
The `nonnull' attribute specifies that some function parameters should be non-null pointers. This is very useful as it helps the compiler generate warnings on suspicious code and can also enable some small optimizations. In clang this is also useful for the static analyzer.
While we could go on defining this all over the tree, it only makes sense to annotate a subset of critical functions.
Hinted by: Android's bionic libc Differential Revision: https://reviews.freebsd.org/D2101
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270943 |
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01-Sep-2014 |
ed |
Add lock annotations to the header files of our threading libraries.
This change extends all of the functions present in the <pthread.h> and <threads.h> headers to have lock annotations. This will allow Clang to warn about the following:
- Locking a function twice, - Unlocking a function without a mutex being locked, - Forgetting to unlock a mutex before returning, - Destroying or reinitializing a mutex that is currenty locked, - Using an unlocked mutex in combination with a condition variable.
Enabling these annotations already allowed me to catch a bug in one of our userspace tools (r270749).
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256925 |
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22-Oct-2013 |
tijl |
Add a dummy statement to the beginning of the pthread_cleanup_pop() macro to allow a call of the macro to be labelled as in:
label: pthread_cleanup_pop();
Reviewed by: imp MFC after: 3 days
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217039 |
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06-Jan-2011 |
davidxu |
Remove leftover for r214093.
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214007 |
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18-Oct-2010 |
davidxu |
Add pthread_rwlockattr_setkind_np and pthread_rwlockattr_getkind_np, the functions set or get pthread_rwlock type, current supported types are: PTHREAD_RWLOCK_PREFER_READER_NP, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, PTHREAD_RWLOCK_PREFER_WRITER_NP, default is PTHREAD_RWLOCK_PREFER_WRITER_NONCECURSIVE_NP, this maintains binary compatible with old code.
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#
213241 |
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28-Sep-2010 |
davidxu |
In current code, statically initialized and destroyed object have same null value, the code can not distinguish between them, to fix the problem, now a destroyed object is assigned to a non-null value, and it will be rejected by some pthread functions. PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP is changed to number 1, so that adaptive mutex can be statically initialized correctly.
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#
189828 |
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14-Mar-2009 |
das |
Fix the visibility of several prototypes. Also move pthread_kill() and pthread_sigmask() to signal.h. In principle, this shouldn't break anything, since they're already in signal.h on other systems, and the FreeBSD manpage says that both pthread.h and signal.h need to be included to get these functions.
Add a hack to declare pthread_t in the P1003.1-2008 namespace in signal.h.
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#
179662 |
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09-Jun-2008 |
davidxu |
Make pthread_cleanup_push() and pthread_cleanup_pop() as a pair of macros, use stack space to keep cleanup information, this eliminates overhead of calling malloc() and free() in thread library.
Discussed on: thread@
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#
177494 |
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22-Mar-2008 |
davidxu |
Add POSIX pthread API pthread_getcpuclockid() to get a thread's cpu time clock id.
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#
173154 |
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29-Oct-2007 |
kris |
Add a new "non-portable" mutex type, PTHREAD_MUTEX_ADAPTIVE_NP. This is also implemented in glibc and is used by a number of existing applications (mysql, firefox, etc).
This mutex type is a default mutex with the additional property that it spins briefly when attempting to acquire a contested lock, doing trylock operations in userland before entering the kernel to block if eventually unsuccessful.
The expectation is that applications requesting this mutex type know that the mutex is likely to be only held for very brief periods, so it is faster to spin in userland and probably succeed in acquiring the mutex, than to enter the kernel and sleep, only to be woken up almost immediately. This can help significantly in certain cases when pthread mutexes are heavily contended and held for brief durations (such as mysql).
Spin up to 200 times before entering the kernel, which represents only a few us on modern CPUs. No performance degradation was observed with this value and it is sufficient to avoid a large performance drop in mysql performance in the heavily contended pthread mutex case.
The libkse implementation is a NOP.
Reviewed by: jeff MFC after: 3 days
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#
151617 |
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24-Oct-2005 |
davidxu |
Add prototype for following functions, plus tab fixes. pthread_condattr_getpshared pthread_condattr_setpshared pthread_mutexattr_getpshared pthread_mutexattr_setpshared
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#
149692 |
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01-Sep-2005 |
stefanf |
Improve POSIX conformance: - Don't pollute the namespace by including <sys/types.h>, <sys/time.h>, <sys/signal.h> and <limits.h>. Use __MINSIGSTKSZ and __ULONG_MAX from <machine/_limits.h>, __sigset_t from <sys/_sigset.h> instead. - Include <time.h> because POSIX says we have to.
PTHREAD_{DESTRUCTOR_ITERATIONS,KEYS_MAX,STACK_MIN,THREADS_MAX} should eventually move to <limits.h> but are left here for now.
Discussed on: standards@, threads@
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149298 |
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19-Aug-2005 |
stefanf |
- Prefix MUTEX_TYPE_MAX with PTHREAD_ to avoid namespace pollution. - Remove the macros MUTEX_TYPE_FAST and MUTEX_TYPE_COUNTING_FAST.
OK'ed by: deischen
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149273 |
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19-Aug-2005 |
stefanf |
Remove parameter names, the identifiers were in the user namespace.
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#
146824 |
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31-May-2005 |
rodrigc |
According to: http://www.opengroup.org/onlinepubs/009695399/basedefs/sys/types.h.html
#include <sys/types.h> should include the definitions of pthread types.
PR: standards/78907 Reported by: Brooks Davis Approved by: das (mentor)
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144892 |
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11-Apr-2005 |
davidxu |
Increase PTHREAD_STACK_MIN to MINSIGSTKSZ because thread libraries now use makecontext which enforces a minimum stack size to be MINSIGSTKSZ.
Bug report: Bill Middleton <flashdict at gmail dot com>, BSD-sharp project.
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144615 |
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03-Apr-2005 |
davidxu |
Add pthread_condattr_getclock, pthread_condattr_setclock.
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#
139902 |
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08-Jan-2005 |
davidxu |
Fix typo, function name pthread_rwlock_timedrwlock should be pthread_rwlock_timedwrlock.
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#
122076 |
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04-Nov-2003 |
deischen |
Add the pthread_atfork() prototype.
Reviewed by: davidxu
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119909 |
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09-Sep-2003 |
davidxu |
Add code to support pthread spin lock.
Reviewed by: deischen
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119790 |
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06-Sep-2003 |
davidxu |
Add small piece of code to support pthread_rwlock_timedrdlock and pthread_rwlock_timedrwlock.
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#
119736 |
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04-Sep-2003 |
davidxu |
Add code to support barrier synchronous object and implement pthread_mutex_timedlock().
Reviewed by: deischen
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113729 |
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20-Apr-2003 |
jdp |
Add stub implementations of pthread_[gs]etconcurrency to libc_r and libthr. No changes were made to libpthread by request of deischen, who will soon commit a real implementation for that library.
PR: standards/50848 Submitted by: Sergey A. Osokin <osa@freebsd.org.ru> MFC after: 1 week
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#
110636 |
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10-Feb-2003 |
alfred |
Add pthread_attr_getstack() and pthread_attr_setstack().
Submitted by: Craig Rodrigues <rodrigc@attbi.com>
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#
109719 |
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23-Jan-2003 |
wollman |
In the absence of consensus as to implement stubs for these TSH-shaded routines, remove their declarations. Even though rwlocks have the same functions, XBDft does not shade those declarations so I am leaving them in. (This is probably a bug in the Standard.)
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#
93032 |
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23-Mar-2002 |
imp |
Breath deep and take __P out of the system include files.
# This appears to not break X11, but I'm having problems compiling the # glide part of the server with or without this patch, so I can't tell # for sure.
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#
80021 |
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20-Jul-2001 |
jasone |
Implement pthread_attr_[gs]etguardsize(). Non-default-size stacks used to be malloc()ed, but they are now allocated using mmap(), just as the default-size stacks are. A separate cache of stacks is kept for non-default-size stacks.
Collaboration with: deischen
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#
73548 |
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04-Mar-2001 |
alfred |
mark pthread_exit() as non-returning.
Requested by: Farooq Mela <fmela0@sm.socccd.cc.ca.us>
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#
70442 |
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28-Dec-2000 |
jasone |
Remove prototypes for pthread_attr_[gs]etfloatstate(), which we don't implement.
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#
60382 |
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11-May-2000 |
bde |
Fixed missing consts for function parameters, so that the code matches the man page and POSIX.1. Fixed nearby misformatting. Fixed a missing prototype.
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#
57350 |
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20-Feb-2000 |
jasone |
Do not conditionalize function prototype definition for functions we implement.
Noticed by: Thimble Smith <tim@mysql.com> Approved by: jkh
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#
55708 |
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10-Jan-2000 |
deischen |
Make sched_param parameter a const to comply with POSIX and SUSv2 specs. This doesn't need to be applied to stable, because somehow -stable seems to have gotten it right.
Reviewed by: jasone
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#
54757 |
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18-Dec-1999 |
jasone |
Fix some minor POSIX/SUSv2 compliance nits.
PR: kern/11982
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#
54699 |
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16-Dec-1999 |
jasone |
Move POSIX feature constants from pthread.h to unistd.h, as required by 1003.1c-1995.
Undefine _POSIX_THREAD_SAFE_FUNCTIONS, since we do not implement all of the necessary interfaces. At least getgrgid_r(), getrnam_r(), getpwuid_r(), getpwnam_r(), getc_unlocked(), getchar_unlocked(), putc_unlocked(), and putchar_unlocked() are missing. Due to a likely typo in 1003.1c-1995, we are not technically allowed to define _POSIX_THREADS without defining _POSIX_THREAD_SAFE_FUNCTIONS, but either way we're non-compliant, so I'm leaving _POSIX_THREADS defined.
PR: bin/8281
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#
53812 |
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28-Nov-1999 |
alfred |
add pthread_cancel, obtained from OpenBSD.
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
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#
50473 |
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27-Aug-1999 |
peter |
$Id$ -> $FreeBSD$
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#
49307 |
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31-Jul-1999 |
rse |
Cleanups to the pthread header files.
Submitted by: Ralf S. Engelschall <rse@engelschall.com> Reviewed by: John Birrell <jb@cimlogic.com.au>
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#
49127 |
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27-Jul-1999 |
deischen |
Hide pthread cancellation routines behind #ifdef NOT_YET. They are not currently supported. Also corrected the declaration for pthread_testcancel which incorrectly returned int when POSIX and SUSv2 both say it should be void.
Submitted by: Ralf S. Engelschall <rse@engelschall.com> Reviewed by: John Birrell <jb@freebsd.org>
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#
44965 |
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23-Mar-1999 |
jb |
o Runnable threads are now maintained in priority queues. The implementation requires two things:
1.) The priority queues must be protected during insertion and removal of threads. Since the kernel scheduler must modify the priority queues, a spinlock for protection cannot be used. The functions _thread_kern_sched_defer() and _thread_kern_sched_undefer() were added to {un}defer kernel scheduler activation.
2.) A thread (active) priority change can be performed only when the thread is removed from the priority queue. The implementation uses a threads active priority when inserting it into the queue.
A by-product is that thread switches are much faster. A separate queue is used for waiting and/or blocked threads, and it is searched at most 2 times in the kernel scheduler when there are active threads. It should be possible to reduce this to once by combining polling of threads waiting on I/O with the loop that looks for timed out threads and the minimum timeout value.
o Functions to defer kernel scheduler activation were added. These are _thread_kern_sched_defer() and _thread_kern_sched_undefer() and may be called recursively. These routines do not block the scheduling signal, but latch its occurrence. The signal handler will not call the kernel scheduler when the running thread has deferred scheduling, but it will be called when running thread undefers scheduling.
o Added support for _POSIX_THREAD_PRIORITY_SCHEDULING. All the POSIX routines required by this should now be implemented. One note, SCHED_OTHER, SCHED_FIFO, and SCHED_RR are required to be defined by including pthread.h. These defines are currently in sched.h. I modified pthread.h to include sched.h but don't know if this is the proper thing to do.
o Added support for priority protection and inheritence mutexes. This allows definition of _POSIX_THREAD_PRIO_PROTECT and _POSIX_THREAD_PRIO_INHERIT.
o Added additional error checks required by POSIX for mutexes and condition variables.
o Provided a wrapper for sigpending which is marked as a hidden syscall.
o Added a non-portable function as a debugging aid to allow an application to monitor thread context switches. An application can install a routine that gets called everytime a thread (explicitly created by the application) gets context switched. The routine gets passed the pthread IDs of the threads that are being switched in and out. I found this useful, but we can get rid of it if you want.
Submitted by: Dan Eischen <eischen@vigrid.com>
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#
41390 |
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28-Nov-1998 |
eivind |
Add support for pthread_mutexattr_settype(). As a side effect of testing this, fix MUTEX_TYPE_COUNTING_FAST. Recursive locks now work.
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#
38919 |
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07-Sep-1998 |
alex |
Implement pthread read/write locks as defined by Version 2 of the Single UNIX Specification.
As with our standard mutexes, process shared locks are not supported at this time.
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#
35025 |
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04-Apr-1998 |
jb |
Add static initializer defines as specified by POSIX.
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#
31985 |
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25-Dec-1997 |
alex |
Changed pthread_detach to conform to POSIX, i.e. the single argument provided is of type pthread_t instead of pthread_t *.
PR: 4320
Return EINVAL instead of ESRCH if attempting to detach an already detached thread.
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#
25519 |
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07-May-1997 |
bde |
Fixed missing __P() to complete the K&R support in this header.
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#
23364 |
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04-Mar-1997 |
alex |
Comment out _POSIX_THREAD_PRIORITY_SCHEDULING since it's not supported at this time.
Reviewed by: John Birrell <jb@cimlogic.com.au>
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#
22315 |
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05-Feb-1997 |
julian |
Submitted by: John Birrell uthreads update from the author.
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#
19637 |
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11-Nov-1996 |
hsu |
Moved pthread_mutexattr_default inside #ifndef PTHREAD_KERNEL now that we use it in the uthreads implementation. Moved enum pthread_mutextype here from libc_r/uthread/pthread_private.h. Change prototype for pthread_getspecific().
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#
17706 |
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20-Aug-1996 |
julian |
Submitted by: John Birrell <cimaxp1!jb@werple.net.au>
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.
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#
13547 |
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22-Jan-1996 |
julian |
Submitted by: john birrel
Obtained from: uthread package
thrreads definitions
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