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2026-01-01; Add 2026 to copyright years.Sean Whitton
2025-12-03Waste 4 fewer bytes in GNU/Linux 32-bit HPPAPaul Eggert
Also, add more commentary about the situation. * src/systhread.h (SYSTHREAD_ALIGN_ROOM): Use alignof (double), not alignof (int), to align the room. This means we have only 8 (not 12) bytes of slop on 32-bit HPPA GNU/Linux.
2025-12-02Port to GNU/Linux HPPA mallocPaul Eggert
On this platform, you cannot reliably malloc objects containing values of type pthread_mutex_t or pthread_cond_t, since malloc guarantees only 8-byte alignment but these two types require 16-byte alignment. See GCC bug 115750 <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115750> reported by Sam James and Emacs bug 79936 <https://bugs.gnu.org/79936> reported by John Paul Adrian Glaubitz. * configure.ac (ALIGNOF_MAX_ALIGN_T, ALIGNOF_PTHREAD_COND_T) (ALIGNOF_PTHREAD_MUTEX_T) [HAVE_PTHREAD]: New C macros. * src/systhread.c (sys_mutex_init, sys_mutex_lock) (sys_mutex_unlock, sys_cond_init, sys_cond_wait) (sys_cond_signal, sys_cond_broadcast, sys_cond_destroy): Use SYTHREAD_ALIGN_PTR to convert sys_mutex_t and sys_cond_t to pthread_mutex_t and pthread_cond_t, since runtime conversion is needed on GNU/Linux HPPA. * src/systhread.h (SYSTHREAD_ALIGN_ROOM, SYSTHREAD_ALIGN_PTR): New macros, which affect the generated code only on unusual platforms like GNU/Linux HPPA. (sys_mutex_t, sys_cond_t) [HAVE_PTHREAD]: Use them.
2025-01-01Update copyright year to 2025Paul Eggert
Run "TZ=UTC0 admin/update-copyright".
2024-01-02; Add 2024 to copyright yearsPo Lu
2023-01-01; Add 2023 to copyright years.Eli Zaretskii
2022-09-28Port better to C23 bool+true+false keywordsPaul Eggert
C23 is adding the C++ keywords bool, true, and false; prefer them to <stdbool.h> if they are available. * admin/merge-gnulib (GNULIB_MODULES): Add stdbool, which emulates C23 on pre-C23 platforms. (AVOIDED_MODULES): Remove stdbool; Gnulib has renamed this module to stdbool-c99 and nobody uses it so it does not need to be avoided. * m4/c-bool.m4: New file, from Gnulib stdbool module. * lib-src/seccomp-filter.c, src/conf_post.h, src/dynlib.h: * src/emacs-module.c, src/nsterm.m, src/systhread.h: * test/src/emacs-module-resources/mod-test.c: Use the C23 style and use bool without including <stdbool.h>. The Gnulib stdbool module causes config.h to include stdbool.h on pre-C23 platforms. * src/emacs-module.h.in: Don’t include <stdbool.h> if C23 or later, or if it has already been included.
2022-03-08Do not include <attribute.h> from <config.h>Paul Eggert
This is because mod-test.c shouldn’t use source code from lib, but it does need to include <config.h>. * lib-src/ebrowse.c, lib-src/emacsclient.c, lib-src/etags.c: * lib-src/make-docfile.c, lib-src/movemail.c: * lib-src/seccomp-filter.c, src/dynlib.h, src/lisp.h: * src/syssignal.h, src/sysstdio.h, src/systhread.h, src/tparam.h: Include <attribute.h>. * src/conf_post.h: Do not include <attribute.h>. All uses of attribute.h macros replaced with their _GL_ equivalents.
2022-01-01; Add 2022 to copyright years.Eli Zaretskii
2021-10-03Port systhreads.h to C2xPaul Eggert
* src/systhread.h: Put NODISCARD at the start of extern declarations, not at the end. This is needed by C2x. This patch also pacifies gcc 11.2.1 -Wattributes.
2021-01-01Update copyright year to 2021Paul Eggert
Run "TZ=UTC0 admin/update-copyright".
2020-05-03Simplify by using attribute.h macrosPaul Eggert
attribute.h is partly designed for C2X forward compatibility, since C2X will add some standard attributes. Using its macros should help insulate Emacs from C2X teething problems. * src/conf_post.h: Include attribute.h. (HAS_ATTRIBUTE, HAS_FEATURE): Rename from __has_attribute and __has_feature, to avoid polluting the builtin namespace. All uses changed. (ATTRIBUTE_COLD, ATTRIBUTE_FORMAT, FALLTHROUGH, ATTRIBUTE_CONST) (ATTRIBUTE_PURE, ATTRIBUTE_UNUSED, ATTRIBUTE_MAY_ALIAS) (ATTRIBUTE_MALLOC, ATTRIBUTE_ALLOC_SIZE) (ATTRIBUTE_RETURNS_NONNULL): Remove, as attribute.h does this now. (NO_INLINE, EXTERNALLY_VISIBLE, ARG_NONNULL, ATTRIBUTE_UNUSED): Simplify by defining in terms of attribute.h macros. * src/systhread.h (ATTRIBUTE_WARN_UNUSED_RESULT): Remove. All uses replaced by attribute.h’s NODISCARD.
2020-01-07Fix BSD and macOS builds w.r.t. pthread_setname_np (bug#38632)Mattias Engdegård
pthread_setname_np takes only a single argument on BSD and macOS, and affects the current thread only. * configure.ac: Add check for single-argument pthread_setname_np * src/systhread.c (sys_thread_set_name): New (w32 and pthread versions). (sys_thread_create): Remove name argument and name-setting. (w32_beginthread_wrapper): Remove name-setting. * src/systhread.h (sys_thread_create, sys_thread_set_name): Update prototypes. * src/thread.c (run_thread): Call sys_thread_set_name. (Fmake_thread): Adapt call to sys_thread_create. * src/thread.h (struct thread_state): Adjust comment.
2020-01-01Update copyright year to 2020Paul Eggert
Run "TZ=UTC0 admin/update-copyright $(git ls-files)".
2019-04-22Improve wur coverage on older GCCsPaul Eggert
* src/conf_post.h (__has_attribute_warn_unused_result): New macro for compilers lacking __has_attribute. * src/systhread.h (__has_attribute): Remove ineffective define. (ATTRIBUTE_WARN_UNUSED_RESULT): Work better on GCC 3.4 thru 4.
2018-12-31Merge from origin/emacs-26Paul Eggert
2fcf2df Fix copyright years by hand 26bed8b Update copyright year to 2019 2814292 Fix value of default frame height. (Bug#33921)
2019-01-01Update copyright year to 2019Paul Eggert
Run 'TZ=UTC0 admin/update-copyright $(git ls-files)'.
2018-06-09Make error checking for thread functions stricter.Philipp Stephani
* src/systhread.c (sys_thread_create): Change return type to bool. Check for errors returned by pthread_attr_setstacksize and pthread_attr_destroy. (sys_mutex_init): Abort on errors. Enable mutex checks when checking is enabled. (sys_cond_init): Abort on errors. (sys_mutex_lock, sys_mutex_unlock, sys_cond_wait) (sys_cond_signal, sys_cond_broadcast, sys_cond_destroy): Check for errors in debug mode.
2018-01-18Fix module support if threads are disabled (Bug#30106)Philipp Stephani
* src/systhread.c (sys_thread_equal): New function. * src/thread.c (in_current_thread): Move from emacs-module.c; use sys_thread_equal.
2018-01-01Update copyright year to 2018Paul Eggert
Run admin/update-copyright.
2017-09-13Prefer HTTPS to FTP and HTTP in documentationPaul Eggert
Most of this change is to boilerplate commentary such as license URLs. This change was prompted by ftp://ftp.gnu.org's going-away party, planned for November. Change these FTP URLs to https://ftp.gnu.org instead. Make similar changes for URLs to other organizations moving away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and fsf.org when this works, as this will further help defend against man-in-the-middle attacks (for this part I omitted the MS-DOS and MS-Windows sources and the test tarballs to keep the workload down). HTTPS is not fully working to lists.gnu.org so I left those URLs alone for now.
2017-02-26Remove a few unused C functionsPaul Eggert
* src/eval.c (let_shadows_global_binding_p): * src/print.c (write_string): * src/systhread.c (sys_mutex_destroy, sys_thread_equal): Remove. * src/print.c (write_string): Rename from write_string_1. All uses changed.
2017-01-01Update copyright year to 2017 in masterPaul Eggert
Run admin/update-copyright in the master branch. This fixes files that were not already fixed in the emacs-25 branch before it was merged here.
2016-12-10; Fix copyright years in new filesGlenn Morris
2013-08-31Improve MS-Windows implementation of threads.Eli Zaretskii
src/systhread.c (sys_cond_init): Set the 'initialized' member to true only if initialization is successful. Initialize wait_count and wait_count_lock. (sys_cond_wait, sys_cond_signal, sys_cond_broadcast): If 'initialized' is false, do nothing. (sys_cond_wait): Fix the implementation to avoid the "missed wakeup" bug: count the waiting threads, and reset the broadcast event once the last thread was released. (sys_cond_signal, sys_cond_broadcast): Use SetEvent instead of PulseEvent. Don't signal the event if no threads are waiting. (sys_cond_destroy): Only close non-NULL handles. (sys_thread_create): Return zero if unsuccessful, 1 if successful. src/systhread.h (w32thread_cond_t): New member 'initialized'. Rename waiters_count and waiters_count_lock to wait_count and wait_count_lock, respectively.
2013-08-30Enable thread support in the MS-Windows build.Eli Zaretskii
src/systhread.h (w32thread_critsect, w32thread_cond_t, sys_mutex_t) (sys_cond_t, sys_thread_t) [WINDOWSNT]: New data types. src/systhread.c (sys_mutex_init, sys_mutex_lock, sys_mutex_unlock) (sys_mutex_destroy, sys_cond_init, sys_cond_wait) (sys_cond_signal, sys_cond_broadcast, sys_cond_destroy) (sys_thread_self, sys_thread_equal, w32_beginthread_wrapper) (sys_thread_create, sys_thread_yield) [WINDOWSNT]: New functions. configure.ac (THREADS_ENABLED): Enable threads for MinGW, even if pthreads is not available.
2013-08-26implement --enable-threads and a thread-less modeTom Tromey
2012-08-20pass the thread name to the OS if possibleTom Tromey
use prctl to pass the thread name to the OS, if possible
2012-08-18refactor systhread.hTom Tromey
This refactors systhread.h to move the notion of a "lisp mutex" into thread.c. This lets us make make the global lock and post_acquire_global_lock static.
2012-08-15This introduces the low-level system threading support. It also addsTom Tromey
the global lock. The low-level support is a bit over-eager, in that even at the end of the present series, it will not all be used. I think thiat is ok since I plan to use it all eventually -- in particular for the emacs lisp mutex implementation. I've only implemented the pthreads-based version. I think it should be relatively clear how to port this to other systems, though. I'd also like to do a "no threads" port that will turn most things into no-ops, and have thread-creation fail. I was thinking perhaps I'd make a future (provide 'threads) conditional on threads actually working. One other minor enhancement available here is to make it possible to set the name of the new thread at the OS layer. That way gdb, e.g., could display thread names.
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