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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2017-06-27 10:29:29 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2018-07-24 14:06:45 -0300
commitce7528f637f7b9cddb3c22081d7e09b2a26c89bf (patch)
tree96263946f49c1ac25f61ee9aeebd3b0e34fd5036 /conform
parente27f41ba2b6101be1a511905bff5502ffd23828b (diff)
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nptl: Add C11 threads thrd_* functions
This patch adds the thrd_* definitions from C11 threads (ISO/IEC 9899:2011), more specifically thrd_create, thrd_curent, rhd_detach, thrd_equal, thrd_exit, thrd_join, thrd_sleep, thrd_yield, and required types. Mostly of the definitions are composed based on POSIX conterparts, such as thrd_t (using pthread_t). For thrd_* function internally direct POSIX pthread call are used with the exceptions: 1. thrd_start uses pthread_create internal implementation, but changes how to actually calls the start routine. This is due the difference in signature between POSIX and C11, where former return a 'void *' and latter 'int'. To avoid calling convention issues due 'void *' to int cast, routines from C11 threads are started slight different than default pthread one. Explicit cast to expected return are used internally on pthread_create and the result is stored back to void also with an explicit cast. 2. thrd_sleep uses nanosleep internal direct syscall to avoid clobbering errno and to handle expected standard return codes. It is a cancellation entrypoint to be consistent with both thrd_join and cnd_{timed}wait. 3. thrd_yield also uses internal direct syscall to avoid errno clobbering. Checked with a build for all major ABI (aarch64-linux-gnu, alpha-linux-gnu, arm-linux-gnueabi, i386-linux-gnu, ia64-linux-gnu, m68k-linux-gnu, microblaze-linux-gnu [1], mips{64}-linux-gnu, nios2-linux-gnu, powerpc{64le}-linux-gnu, s390{x}-linux-gnu, sparc{64}-linux-gnu, and x86_64-linux-gnu). Also ran a full check on aarch64-linux-gnu, x86_64-linux-gnu, i686-linux-gnu, arm-linux-gnueabhf, and powerpc64le-linux-gnu. [BZ #14092] * conform/Makefile (conformtest-headers-ISO11): Add threads.h. (linknamespace-libs-ISO11): Add libpthread.a. * conform/data/threads.h-data: New file: add C11 thrd_* types and functions. * include/stdc-predef.h (__STDC_NO_THREADS__): Remove definition. * nptl/Makefile (headers): Add threads.h. (libpthread-routines): Add new C11 thread thrd_create, thrd_current, thrd_detach, thrd_equal, thrd_exit, thrd_join, thrd_sleep, and thrd_yield. * nptl/Versions (libpthread) [GLIBC_2.28]): Add new C11 thread thrd_create, thrd_current, thrd_detach, thrd_equal, thrd_exit, thrd_join, thrd_sleep, and thrd_yield symbols. * nptl/descr.h (struct pthread): Add c11 field. * nptl/pthreadP.h (ATTR_C11_THREAD): New define. * nptl/pthread_create.c (START_THREAD_DEFN): Call C11 thread start routine with expected function prototype. (__pthread_create_2_1): Add C11 threads check based on attribute value. * sysdeps/unix/sysdep.h (INTERNAL_SYSCALL_CANCEL): New macro. * nptl/thrd_create.c: New file. * nptl/thrd_current.c: Likewise. * nptl/thrd_detach.c: Likewise. * nptl/thrd_equal.c: Likewise. * nptl/thrd_exit.c: Likewise. * nptl/thrd_join.c: Likewise. * nptl/thrd_priv.h: Likewise. * nptl/thrd_sleep.c: Likewise. * nptl/thrd_yield.c: Likewise. * include/threads.h: Likewise.
Diffstat (limited to 'conform')
-rw-r--r--conform/Makefile10
-rw-r--r--conform/data/threads.h-data23
2 files changed, 29 insertions, 4 deletions
diff --git a/conform/Makefile b/conform/Makefile
index 74fbda0..a0ab70e 100644
--- a/conform/Makefile
+++ b/conform/Makefile
@@ -34,9 +34,9 @@ conformtest-headers-ISO := assert.h ctype.h errno.h float.h limits.h locale.h \
conformtest-headers-ISO99 := $(conformtest-headers-ISO) complex.h fenv.h \
inttypes.h iso646.h stdbool.h stdint.h tgmath.h \
wchar.h wctype.h
-# Missing ISO11 expectations for: stdatomic.h threads.h.
+# Missing ISO11 expectations for: stdatomic.h
conformtest-headers-ISO11 := $(conformtest-headers-ISO99) stdalign.h \
- stdnoreturn.h uchar.h
+ stdnoreturn.h threads.h uchar.h
conformtest-headers-POSIX := $(conformtest-headers-ISO) aio.h dirent.h \
fcntl.h fnmatch.h glob.h grp.h mqueue.h \
pthread.h pwd.h regex.h sched.h semaphore.h \
@@ -196,8 +196,10 @@ linknamespace-libs-posix = $(linknamespace-libs-thr) \
linknamespace-libs-xsi = $(linknamespace-libs-posix)
linknamespace-libs-ISO = $(linknamespace-libs-isoc)
linknamespace-libs-ISO99 = $(linknamespace-libs-isoc)
-linknamespace-libs-ISO11 = $(linknamespace-libs-isoc)
-linknamespace-libs-XPG4 = $(linknamespace-libs-isoc)
+linknamespace-libs-ISO11 = $(linknamespace-libs-isoc) \
+ $(common-objpfx)nptl/libpthread.a
+linknamespace-libs-XPG4 = $(linknamespace-libs-isoc) \
+ $(common-objpfx)crypt/libcrypt.a
linknamespace-libs-XPG42 = $(linknamespace-libs-XPG4)
linknamespace-libs-POSIX = $(linknamespace-libs-thr)
linknamespace-libs-UNIX98 = $(linknamespace-libs-xsi)
diff --git a/conform/data/threads.h-data b/conform/data/threads.h-data
new file mode 100644
index 0000000..bc2d857
--- /dev/null
+++ b/conform/data/threads.h-data
@@ -0,0 +1,23 @@
+#if defined ISO11
+
+constant thrd_success
+constant thrd_busy
+constant thrd_error
+constant thrd_nomem
+constant thrd_timedout
+
+type thrd_t
+type thrd_start_t
+
+function int thrd_create (thrd_t*, thrd_start_t, void*)
+function int thrd_equal (thrd_t, thrd_t)
+function thrd_t thrd_current (void)
+function int thrd_sleep (const struct timespec*, struct timespec*)
+function void thrd_exit (int)
+function int thrd_detach (thrd_t)
+function int thrd_join (thrd_t, int*)
+function void thrd_yield (void)
+
+#include "time.h-data"
+
+#endif