According to MSVC manual (*1), cl.exe can skip including a header file
when that:
- contains #pragma once, or
- starts with #ifndef, or
- starts with #if ! defined.
GCC has a similar trick (*2), but it acts more stricter (e. g. there
must be _no tokens_ outside of #ifndef...#endif).
Sun C lacked #pragma once for a looong time. Oracle Developer Studio
12.5 finally implemented it, but we cannot assume such recent version.
This changeset modifies header files so that each of them include
strictly one #ifndef...#endif. I believe this is the most portable way
to trigger compiler optimizations. [Bug #16770]
*1: https://docs.microsoft.com/en-us/cpp/preprocessor/once
*2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
Move native thread related lines from vm_core.h.
And declare several functions "rb_nativethread_lock_*",
manipulate locking.
* common.mk: add thread_native.h.
* thread.c: add functions "rb_nativethread_lock_*".
* thraed.c, thread_[pthread,win32].[ch]: rename rb_thread_lock_t
to rb_nativethread_lock_t to make it clear that this lock is for
native thraeds, not for ruby threads.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42133 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* thread_win32.h (rb_thread_lock_t): make a union for USE_WIN32_MUTEX.
this internal is used only in thread_win32.c, but has to be complete
to define rb_thread_t.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36119 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* thread_win32.h (rb_thread_cond_struct): add prev field instead of last.
(ie cond_event_entry is now using double linked list instead of single)
* thread_win32.c (cond_event_entry): add prev field.
* thread_win32.c (__cond_timedwait): remove entry properly if timeout
was happen.
* thread_win32.c (native_cond_signal): change for double linked list.
* thread_win32.c (native_cond_broadcast): ditto.
* thread_win32.c (native_cond_initialize): ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31459 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
APIs to modularize GVL implementation.
* thread_pthread.c, thread_pthread.h: Two GVL implementations.
(1) Simple locking GVL which is same as existing GVL.
(2) Wake-up queued threads. The wake-up order is simple FIFO.
(We can make several queues to support exact priorities, however
this causes some issues such as priority inversion and so on.)
This impl. prevents spin-loop (*1) caused on SMP environemnts.
*1: Only one Ruby thread acqures GVL again and again.
Bug #2359 [ruby-core:26694]
* thread_win32.c, thread_win32.h: Using simple lock
not by CRITICAL_SECTION but by Mutex.
Bug #3890 [ruby-dev:42315]
* vm.c (ruby_vm_destruct): ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29956 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
r18239 because r18245 made the changes unnecessary.
* thread.c (rb_mutex_struct): define after including thread_{pthread,
win32}.c.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18248 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
rb_thread_cond_struct from .c to .h because rb_thread_cond_struct
is used in vm_core.h.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18238 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
thread_win32.c: make some functions static functions.
a patch from Tadashi Saito <shiba AT mail2.accsnet.ne.jp>
in [ruby-core:14407]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14657 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* thread_win32.ci, thread_win32.h, thread_pthread.ci, thread_pthread.h:
prepare native_cond_*() which are based on pthread_cond_*() spec.
* prelude.rb: fix Mutex#synchronize method.
* vm_core.h, include/ruby/intern.h: change unblock function interface
(to pass some user data).
* file.c, process.c: ditto.
* benchmark/bm_vm2_mutex.rb: add a benchmark for mutex.
* benchmark/bm_vm3_thread_mutex.rb: add a benchmark for mutex
with contension.
* benchmark/run.rb: fix to remove ENV['RUBYLIB'] for matzruby.
* test/ruby/test_thread.rb: add a test.
* common.mk: fix benchmark options.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13290 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
