+2018-07-24 Adhemerval Zanella <adhemerval.zanella@linaro.org>
+
+ [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.
+
2018-07-24 H.J. Lu <hongjiu.lu@intel.com>
* bits/indirect-return.h: New file.
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 \
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)
--- /dev/null
+#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
- 3 additional Zanabazar Square characters */
#define __STDC_ISO_10646__ 201706L
-/* We do not support C11 <threads.h>. */
-#define __STDC_NO_THREADS__ 1
-
#endif
--- /dev/null
+#include <nptl/threads.h>
include ../Makeconfig
-headers := pthread.h semaphore.h bits/semaphore.h
+headers := pthread.h semaphore.h bits/semaphore.h threads.h
extra-libs := libpthread
extra-libs-others := $(extra-libs)
routines = alloca_cutoff forward libc-lowlevellock libc-cancellation \
libc-cleanup libc_pthread_init libc_multiple_threads \
- register-atfork pthread_atfork pthread_self
+ register-atfork pthread_atfork pthread_self thrd_current \
+ thrd_equal thrd_sleep thrd_yield
shared-only-routines = forward
static-only-routines = pthread_atfork
pthread_mutex_getprioceiling \
pthread_mutex_setprioceiling \
pthread_setname pthread_getname \
- pthread_setattr_default_np pthread_getattr_default_np
+ pthread_setattr_default_np pthread_getattr_default_np \
+ thrd_create thrd_detach thrd_exit thrd_join
# pthread_setuid pthread_seteuid pthread_setreuid \
# pthread_setresuid \
# pthread_setgid pthread_setegid pthread_setregid \
pthread_cond_wait; pthread_cond_signal;
pthread_cond_broadcast; pthread_cond_timedwait;
}
+ # C11 thread symbols.
+ GLIBC_2.28 {
+ thrd_current; thrd_equal; thrd_sleep; thrd_yield;
+ }
GLIBC_PRIVATE {
__libc_alloca_cutoff;
# Internal libc interface to libpthread
GLIBC_2.22 {
}
+ # C11 thread symbols.
+ GLIBC_2.28 {
+ thrd_create; thrd_detach; thrd_exit; thrd_join;
+ }
+
GLIBC_PRIVATE {
__pthread_initialize_minimal;
__pthread_clock_gettime; __pthread_clock_settime;
/* Resolver state. */
struct __res_state res;
+ /* Indicates whether is a C11 thread created by thrd_creat. */
+ bool c11;
+
/* This member must be last. */
char end_padding[];
#define __PTHREAD_ONCE_DONE 2
#define __PTHREAD_ONCE_FORK_GEN_INCR 4
+/* Attribute to indicate thread creation was issued from C11 thrd_create. */
+#define ATTR_C11_THREAD ((void*)(uintptr_t)-1)
+
/* Condition variable definitions. See __pthread_cond_wait_common.
Need to be defined here so there is one place from which
LIBC_PROBE (pthread_start, 3, (pthread_t) pd, pd->start_routine, pd->arg);
/* Run the code the user provided. */
- THREAD_SETMEM (pd, result, pd->start_routine (pd->arg));
+ void *ret;
+ if (pd->c11)
+ {
+ /* The function pointer of the c11 thread start is cast to an incorrect
+ type on __pthread_create_2_1 call, however it is casted back to correct
+ one so the call behavior is well-defined (it is assumed that pointers
+ to void are able to represent all values of int. */
+ int (*start)(void*) = (int (*) (void*)) pd->start_routine;
+ ret = (void*) (uintptr_t) start (pd->arg);
+ }
+ else
+ ret = pd->start_routine (pd->arg);
+ THREAD_SETMEM (pd, result, ret);
}
/* Call destructors for the thread_local TLS variables. */
const struct pthread_attr *iattr = (struct pthread_attr *) attr;
struct pthread_attr default_attr;
bool free_cpuset = false;
- if (iattr == NULL)
+ bool c11 = (attr == ATTR_C11_THREAD);
+ if (iattr == NULL || c11)
{
lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
default_attr = __default_pthread_attr;
get the information from its thread descriptor. */
pd->start_routine = start_routine;
pd->arg = arg;
+ pd->c11 = c11;
/* Copy the thread attribute flags. */
struct pthread *self = THREAD_SELF;
--- /dev/null
+/* C11 threads thread 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
+thrd_create (thrd_t *thr, thrd_start_t func, void *arg)
+{
+ _Static_assert (sizeof (thr) == sizeof (pthread_t),
+ "sizeof (thr) != sizeof (pthread_t)");
+
+ int err_code = __pthread_create_2_1 (thr, ATTR_C11_THREAD,
+ (void* (*) (void*))func, arg);
+ return thrd_err_map (err_code);
+}
--- /dev/null
+/* C11 threads current thread 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"
+
+thrd_t
+thrd_current (void)
+{
+ return (thrd_t) THREAD_SELF;
+}
--- /dev/null
+/* C11 threads thread detach 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
+thrd_detach (thrd_t thr)
+{
+ int err_code;
+
+ err_code = __pthread_detach (thr);
+ return thrd_err_map (err_code);
+}
--- /dev/null
+/* C11 threads thread equality check 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
+thrd_equal (thrd_t lhs, thrd_t rhs)
+{
+ return lhs == rhs;
+}
--- /dev/null
+/* C11 threads thread exit 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"
+
+_Noreturn void
+thrd_exit (int res)
+{
+ __pthread_exit ((void*)(uintptr_t) res);
+}
--- /dev/null
+/* C11 threads thread join 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
+thrd_join (thrd_t thr, int *res)
+{
+ void *pthread_res;
+ int err_code = __pthread_timedjoin_ex (thr, &pthread_res, NULL, true);
+ if (res)
+ *res = (int) (uintptr_t) pthread_res;
+
+ return thrd_err_map (err_code);
+}
--- /dev/null
+/* Internal C11 threads definitions.
+ 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/>. */
+
+#ifndef THRD_PRIV_H
+# define THRD_PRIV_H
+
+#include <features.h>
+#include <threads.h>
+#include <errno.h>
+#include "pthreadP.h" /* For pthread_{mutex,cond}_t definitions. */
+
+static __always_inline int
+thrd_err_map (int err_code)
+{
+ switch (err_code)
+ {
+ case 0:
+ return thrd_success;
+ case ENOMEM:
+ return thrd_nomem;
+ case ETIMEDOUT:
+ return thrd_timedout;
+ case EBUSY:
+ return thrd_busy;
+ default:
+ return thrd_error;
+ }
+}
+
+#endif
--- /dev/null
+/* C11 threads thread sleep 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 <time.h>
+#include <sysdep-cancel.h>
+
+#include "thrd_priv.h"
+
+int
+thrd_sleep (const struct timespec* time_point, struct timespec* remaining)
+{
+ INTERNAL_SYSCALL_DECL (err);
+ int ret = INTERNAL_SYSCALL_CANCEL (nanosleep, err, time_point, remaining);
+ if (INTERNAL_SYSCALL_ERROR_P (ret, err))
+ {
+ /* C11 states thrd_sleep function returns -1 if it has been interrupted
+ by a signal, or a negative value if it fails. */
+ ret = INTERNAL_SYSCALL_ERRNO (ret, err);
+ if (ret == EINTR)
+ return -1;
+ return -2;
+ }
+ return 0;
+}
--- /dev/null
+/* C11 threads thread yield 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
+thrd_yield (void)
+{
+ INTERNAL_SYSCALL_DECL (err);
+ INTERNAL_SYSCALL_CALL (sched_yield, err);
+}
--- /dev/null
+/* ISO C11 Standard: 7.26 - Thread support library <threads.h>.
+ 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/>. */
+
+#ifndef _THREADS_H
+#define _THREADS_H 1
+
+#include <features.h>
+#include <time.h>
+
+__BEGIN_DECLS
+
+#include <bits/types/struct_timespec.h>
+
+typedef unsigned long int thrd_t;
+typedef int (*thrd_start_t) (void*);
+
+/* Exit and error codes. */
+enum
+{
+ thrd_success = 0,
+ thrd_busy = 1,
+ thrd_error = 2,
+ thrd_nomem = 3,
+ thrd_timedout = 4
+};
+
+/* Threads functions. */
+
+/* Create a new thread executing the function __FUNC. Arguments for __FUNC
+ are passed through __ARG. If succesful, __THR is set to new thread
+ identifier. */
+extern int thrd_create (thrd_t *__thr, thrd_start_t __func, void *__arg);
+
+/* Check if __LHS and __RHS point to the same thread. */
+extern int thrd_equal (thrd_t __lhs, thrd_t __rhs);
+
+/* Return current thread identifier. */
+extern thrd_t thrd_current (void);
+
+/* Block current thread execution for at least the time pointed by
+ __TIME_POINT. The current thread may resume if receives a signal. In
+ that case, if __REMAINING is not NULL, the remaining time is stored in
+ the object pointed by it. */
+extern int thrd_sleep (const struct timespec *__time_point,
+ struct timespec *__remaining);
+
+/* Terminate current thread execution, cleaning up any thread local
+ storage and freeing resources. Returns the value specified in __RES. */
+extern void thrd_exit (int __res) __attribute__ ((__noreturn__));
+
+/* Detach the thread identified by __THR from the current environment
+ (it does not allow join or wait for it). */
+extern int thrd_detach (thrd_t __thr);
+
+/* Block current thread until execution of __THR is complete. In case that
+ __RES is not NULL, will store the return value of __THR when exiting. */
+extern int thrd_join (thrd_t __thr, int *__res);
+
+/* Stop current thread execution and call the scheduler to decide which
+ thread should execute next. The current thread may be selected by the
+ scheduler to keep running. */
+extern void thrd_yield (void);
+
+#ifdef __USE_EXTERN_INLINES
+/* Optimizations. */
+__extern_inline int
+thrd_equal (thrd_t __thread1, thrd_t __thread2)
+{
+ return __thread1 == __thread2;
+}
+#endif
+
+__END_DECLS
+
+#endif /* _THREADS_H */
sc_ret; \
})
+/* Issue a syscall defined by syscall number plus any other argument
+ required. Any error will be returned unmodified (including errno). */
+#define INTERNAL_SYSCALL_CANCEL(...) \
+ ({ \
+ long int sc_ret; \
+ if (SINGLE_THREAD_P) \
+ sc_ret = INTERNAL_SYSCALL_CALL (__VA_ARGS__); \
+ else \
+ { \
+ int sc_cancel_oldtype = LIBC_CANCEL_ASYNC (); \
+ sc_ret = INTERNAL_SYSCALL_CALL (__VA_ARGS__); \
+ LIBC_CANCEL_RESET (sc_cancel_oldtype); \
+ } \
+ sc_ret; \
+ })
+
/* Machine-dependent sysdep.h files are expected to define the macro
PSEUDO (function_name, syscall_name) to emit assembly code to define the
C-callable function FUNCTION_NAME to do system call SYSCALL_NAME.
projects / platform / upstream / glibc.git / commitdiff