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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2017-06-27 11:00:05 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2018-07-24 14:07:12 -0300
commit78d401327f3bcbb06f5d6b388a967cae2ab42b43 (patch)
tree2241a9edf529879956e37a5bec9200225435d906 /nptl
parent918311a3a3c7679f40e2e95fcaa120f8c74ef479 (diff)
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nptl: Add C11 threads tss_* functions
This patch adds the tss_* definitions from C11 threads (ISO/IEC 9899:2011), more specifically tss_create, tss_delete, tss_get, tss_set, and required types. Mostly of the definitions are composed based on POSIX conterparts, including tss_t (pthread_key_t). 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/data/threads.h-data (thread_local): New macro. (TSS_DTOR_ITERATIONS): Likewise. (tss_t): New type. (tss_dtor_t): Likewise. (tss_create): New function. (tss_get): Likewise. (tss_set): Likewise. (tss_delete): Likewise. * nptl/Makefile (libpthread-routines): Add tss_create, tss_delete, tss_get, and tss_set objects. * nptl/Versions (libpthread) [GLIBC_2.28]: Likewise. * nptl/tss_create.c: New file. * nptl/tss_delete.c: Likewise. * nptl/tss_get.c: Likewise. * nptl/tss_set.c: Likewise. * sysdeps/nptl/threads.h (thread_local): New define. (TSS_DTOR_ITERATIONS): Likewise. (tss_t): New typedef. (tss_dtor_t): Likewise. (tss_create): New prototype. (tss_get): Likewise. (tss_set): Likewise. (tss_delete): Likewise.
Diffstat (limited to 'nptl')
-rw-r--r--nptl/Makefile3
-rw-r--r--nptl/Versions2
-rw-r--r--nptl/threads.h28
-rw-r--r--nptl/tss_create.c31
-rw-r--r--nptl/tss_delete.c25
-rw-r--r--nptl/tss_get.c25
-rw-r--r--nptl/tss_set.c26
7 files changed, 138 insertions, 2 deletions
diff --git a/nptl/Makefile b/nptl/Makefile
index 0864aee..e331bf7 100644
--- a/nptl/Makefile
+++ b/nptl/Makefile
@@ -144,7 +144,8 @@ libpthread-routines = nptl-init nptlfreeres vars events version pt-interp \
thrd_create thrd_detach thrd_exit thrd_join \
mtx_destroy mtx_init mtx_lock mtx_timedlock \
mtx_trylock mtx_unlock call_once cnd_broadcast \
- cnd_destroy cnd_init cnd_signal cnd_timedwait cnd_wait
+ cnd_destroy cnd_init cnd_signal cnd_timedwait cnd_wait \
+ tss_create tss_delete tss_get tss_set
# pthread_setuid pthread_seteuid pthread_setreuid \
# pthread_setresuid \
# pthread_setgid pthread_setegid pthread_setregid \
diff --git a/nptl/Versions b/nptl/Versions
index 9c38d67..e7f691d 100644
--- a/nptl/Versions
+++ b/nptl/Versions
@@ -274,7 +274,7 @@ libpthread {
thrd_create; thrd_detach; thrd_exit; thrd_join;
mtx_init; mtx_lock; mtx_timedlock; mtx_trylock; mtx_unlock; mtx_destroy;
call_once; cnd_broadcast; cnd_destroy; cnd_init; cnd_signal;
- cnd_timedwait; cnd_wait;
+ cnd_timedwait; cnd_wait; tss_create; tss_delete; tss_get; tss_set;
}
GLIBC_PRIVATE {
diff --git a/nptl/threads.h b/nptl/threads.h
index e46b1b7..9800f93 100644
--- a/nptl/threads.h
+++ b/nptl/threads.h
@@ -27,6 +27,14 @@ __BEGIN_DECLS
#include <bits/pthreadtypes-arch.h>
#include <bits/types/struct_timespec.h>
+#ifndef __cplusplus
+# define thread_local _Thread_local
+#endif
+
+#define TSS_DTOR_ITERATIONS 4
+typedef unsigned int tss_t;
+typedef void (*tss_dtor_t) (void*);
+
typedef unsigned long int thrd_t;
typedef int (*thrd_start_t) (void*);
@@ -174,6 +182,26 @@ extern int cnd_timedwait (cnd_t *__restrict __cond,
resources. */
extern void cnd_destroy (cnd_t *__COND);
+
+/* Thread specific storage functions. */
+
+/* Create new thread-specific storage key and stores it in the object pointed
+ by __TSS_ID. If __DESTRUCTOR is not NULL, the function will be called when
+ the thread terminates. */
+extern int tss_create (tss_t *__tss_id, tss_dtor_t __destructor);
+
+/* Return the value held in thread-specific storage for the current thread
+ identified by __TSS_ID. */
+extern void *tss_get (tss_t __tss_id);
+
+/* Sets the value of the thread-specific storage identified by __TSS_ID for
+ the current thread to __VAL. */
+extern int tss_set (tss_t __tss_id, void *__val);
+
+/* Destroys the thread-specific storage identified by __TSS_ID. The
+ destructor is not called until thrd_exit is called. */
+extern void tss_delete (tss_t __tss_id);
+
__END_DECLS
#endif /* _THREADS_H */
diff --git a/nptl/tss_create.c b/nptl/tss_create.c
new file mode 100644
index 0000000..c1b148c
--- /dev/null
+++ b/nptl/tss_create.c
@@ -0,0 +1,31 @@
+/* C11 threads thread-specific creation implementation.
+ Copyright (C) 2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include "thrd_priv.h"
+
+int
+tss_create (tss_t *tss_id, tss_dtor_t destructor)
+{
+ _Static_assert (sizeof (tss_t) == sizeof (pthread_key_t),
+ "sizeof (tss_t) != sizeof (pthread_key_t)");
+ _Static_assert (TSS_DTOR_ITERATIONS == PTHREAD_DESTRUCTOR_ITERATIONS,
+ "TSS_DTOR_ITERATIONS != PTHREAD_DESTRUCTOR_ITERATIONS");
+
+ int err_code = __pthread_key_create (tss_id, destructor);
+ return thrd_err_map (err_code);
+}
diff --git a/nptl/tss_delete.c b/nptl/tss_delete.c
new file mode 100644
index 0000000..0fc2975
--- /dev/null
+++ b/nptl/tss_delete.c
@@ -0,0 +1,25 @@
+/* C11 threads thread-specific delete implementation.
+ Copyright (C) 2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include "thrd_priv.h"
+
+void
+tss_delete (tss_t tss_id)
+{
+ __pthread_key_delete (tss_id);
+}
diff --git a/nptl/tss_get.c b/nptl/tss_get.c
new file mode 100644
index 0000000..5e09766
--- /dev/null
+++ b/nptl/tss_get.c
@@ -0,0 +1,25 @@
+/* C11 threads thread-specific get implementation.
+ Copyright (C) 2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include "thrd_priv.h"
+
+void *
+tss_get (tss_t tss_id)
+{
+ return __pthread_getspecific (tss_id);
+}
diff --git a/nptl/tss_set.c b/nptl/tss_set.c
new file mode 100644
index 0000000..03973d9
--- /dev/null
+++ b/nptl/tss_set.c
@@ -0,0 +1,26 @@
+/* C11 threads thread-specific set implementation.
+ Copyright (C) 2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include "thrd_priv.h"
+
+int
+tss_set (tss_t tss_id, void *val)
+{
+ int err_code = __pthread_setspecific (tss_id, val);
+ return thrd_err_map (err_code);
+}