glibc/stdlib/cxa_atexit.c

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/* Copyright (C) 1999, 2001, 2002, 2005, 2006 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <assert.h>
#include <stdlib.h>
#include <bits/libc-lock.h>
#include "exit.h"
#include <atomic.h>
#include <sysdep.h>
Update. * sysdeps/mach/hurd/chown.c: Use INTDEF for __chown. * sysdeps/unix/sysv/aix/chown.c: Likewise. * sysdeps/unix/grantpt.c: Use INTUSE for __chown calls. * sysdeps/unix/sysv/linux/m68k/chown.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/chown.c: Likewise. * sysdeps/unix/sysv/linux/i386/chown.c: Use INTDEF2 to define __chown_internal. * sysdeps/unix/sysv/linux/s390/s390-32//chown.c: Likewise. * intl/dcngettext.c [_LIBC]: Use INTUSE for __dcngettext. * intl/dngettext.c [_LIBC] (DCNGETTEXT): Use INTUSE. * intl/ngettext.c: Likewise. * include/sys/socket.h: Declare __connect_internal and define __connect macro if not NOT_IN_libc. * sysdeps/mach/hurd/connect.c: Use INTDEF for __connect. * sysdeps/unix/sysv/aix/connect.c: Likewise. * sysdeps/unix/sysv/linux/connect.S: Add __connect_internal alias. * include/unistd.h: Declare __close_internal and define __close macro if not NOT_IN_libc. * libio/libioP.h (JUMO0, JUMP1, JUMP2, JUMP3, WJUMP0, WJUMP1, WJUMP2, WJUMP3): Add extra parenthesis to avoid expanding element names with macors like __close. * sysdeps/unix/syscalls.list: Add __close_internal alias. * include/unistd.h: Declare __dup2_internal and define __dup2 macro if not NOT_IN_libc. * sysdeps/mach/hurd/dup2.c: Use INTDEF for __dup2. * sysdeps/posix/dup2.c: Use INTDEF for __dup2. * sysdeps/unix/syscalls.list: Add __dup2_internal alias. * include/unistd.h: Declare __fork_internal and define __fork macro if not NOT_IN_libc. * sysdeps/mach/hurd/fork.c: Use INTDEF for __fork. * sysdeps/unix/sysv/aix/fork.c: Likewise. * sysdeps/unix/sysv/linux/syscalls.list: Add __fork_internal alias. * include/stdio_ext.h: Declare __fsetlocking_internal and define __fsetlocking macro to use it if not NOT_IN_libc. * libio/__fsetlocking.c: Use INTDEF for __fsetlocking. * libio/__fbufsize.c: Correct copyright. * libio/__flbf.c: Likewise. * libio/__fpending.c: Likewise. * libio/__fpurge.c: Likewise. * libio/__freadable.c: Likewise. * libio/__freading.c: Likewise. * libio/__fsetlocking.c: Likewise. * libio/__fwritable.c: Likewise. * libio/__fwriting.c: Likewise. * include/stdio.h: Declare __asprintf_internal and define __asprintf macro to use it if not NOT_IN_libc. * stdio-common/asprintf.c: Use INTDEF for __asprintf. * include/mntent.h: Declare __setmntent_internal, __getmntent_r_internal, __endmntent_internal. Define __setmntent, __getmntent_r, and __endmntent macros to use these functions if not NOT_IN_libc. * misc/mntent_r.c: Use INTDEF for __setmntent, __getmntent_r, and __endmntent. * include/math.h: Declare __finite_internal, __finitef_internal, and __finitel_internal. Redefine isfinite macro if in libc or libm using these functions. * sysdeps/generic/s_ldexp.c: Use INTUSE for __finite calls. * sysdeps/generic/s_ldexpf.c: Use INTUSE for __finitef calls. * sysdeps/generic/s_ldexpl.c: Use INTUSE for __finitel calls. * sysdeps/i386/fpu/s_finite.S: Define _internal alias. * sysdeps/i386/fpu/s_finitef.S: Likewise. * sysdeps/i386/fpu/s_finitel.S: Likewise. * sysdeps/ieee754/dbl-64/s_finite.c: Likewise. * sysdeps/ieee754/flt-32/s_finitef.c: Likewise. * sysdeps/ieee754/ldbl-128/s_finitel.c: Likewise. * sysdeps/ieee754/ldbl-96/s_finitel.c: Likewise. * include/fcntl.h: Declare __fcntl_internal. Define __fcntl macro to use this function if not NOT_IN_libc. * libio/iofdopen.c (_IO_fcntl): Use INTUSE. * sysdeps/generic/fcntl.c: Use INTDEF for __fcntl. * sysdeps/mach/hurd/fcntl.c: Likewise. * sysdeps/unix/sysv/aix/fcntl.c: Likewise. * sysdeps/unix/sysv/linux/i386/fcntl.c: Likewise. * include/argz.h: Declare __argz_count_internal and __argz_stringify_internal. * intl/l10nflist.c [_LIBC]: Use INTUSE for __argz_count and __argz_stringify. * string/argz-count.c: Use INTDEF for __argz_count. * string/argz-stringify.c: Use INTDEF for __argz_stringify. * include/stdlib.h: Declare __cxa_atexit_internal and define __cxa_atexit macro if not NOT_IN_libc. * stdlib/cxa_atexit.c: Use INTDEF for __cxa_atexit. * dlfcn/Makefile: Define NOT_IN_libc when compiling modcxaatexit.c. * assert/assert.c: Use INTDEF for __assert_fail. * assert/__assert.c: Use INTUSE for call to __assert_fail. * include/assert.h: Declare __assert_fail_internal.
2002-04-09 20:36:24 +00:00
#undef __cxa_atexit
/* Register a function to be called by exit or when a shared library
is unloaded. This function is only called from code generated by
the C++ compiler. */
int
__cxa_atexit (void (*func) (void *), void *arg, void *d)
{
struct exit_function *new = __new_exitfn ();
if (new == NULL)
return -1;
#ifdef PTR_MANGLE
PTR_MANGLE (func);
#endif
new->func.cxa.fn = (void (*) (void *, int)) func;
new->func.cxa.arg = arg;
new->func.cxa.dso_handle = d;
atomic_write_barrier ();
new->flavor = ef_cxa;
return 0;
}
Update. * sysdeps/mach/hurd/chown.c: Use INTDEF for __chown. * sysdeps/unix/sysv/aix/chown.c: Likewise. * sysdeps/unix/grantpt.c: Use INTUSE for __chown calls. * sysdeps/unix/sysv/linux/m68k/chown.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/chown.c: Likewise. * sysdeps/unix/sysv/linux/i386/chown.c: Use INTDEF2 to define __chown_internal. * sysdeps/unix/sysv/linux/s390/s390-32//chown.c: Likewise. * intl/dcngettext.c [_LIBC]: Use INTUSE for __dcngettext. * intl/dngettext.c [_LIBC] (DCNGETTEXT): Use INTUSE. * intl/ngettext.c: Likewise. * include/sys/socket.h: Declare __connect_internal and define __connect macro if not NOT_IN_libc. * sysdeps/mach/hurd/connect.c: Use INTDEF for __connect. * sysdeps/unix/sysv/aix/connect.c: Likewise. * sysdeps/unix/sysv/linux/connect.S: Add __connect_internal alias. * include/unistd.h: Declare __close_internal and define __close macro if not NOT_IN_libc. * libio/libioP.h (JUMO0, JUMP1, JUMP2, JUMP3, WJUMP0, WJUMP1, WJUMP2, WJUMP3): Add extra parenthesis to avoid expanding element names with macors like __close. * sysdeps/unix/syscalls.list: Add __close_internal alias. * include/unistd.h: Declare __dup2_internal and define __dup2 macro if not NOT_IN_libc. * sysdeps/mach/hurd/dup2.c: Use INTDEF for __dup2. * sysdeps/posix/dup2.c: Use INTDEF for __dup2. * sysdeps/unix/syscalls.list: Add __dup2_internal alias. * include/unistd.h: Declare __fork_internal and define __fork macro if not NOT_IN_libc. * sysdeps/mach/hurd/fork.c: Use INTDEF for __fork. * sysdeps/unix/sysv/aix/fork.c: Likewise. * sysdeps/unix/sysv/linux/syscalls.list: Add __fork_internal alias. * include/stdio_ext.h: Declare __fsetlocking_internal and define __fsetlocking macro to use it if not NOT_IN_libc. * libio/__fsetlocking.c: Use INTDEF for __fsetlocking. * libio/__fbufsize.c: Correct copyright. * libio/__flbf.c: Likewise. * libio/__fpending.c: Likewise. * libio/__fpurge.c: Likewise. * libio/__freadable.c: Likewise. * libio/__freading.c: Likewise. * libio/__fsetlocking.c: Likewise. * libio/__fwritable.c: Likewise. * libio/__fwriting.c: Likewise. * include/stdio.h: Declare __asprintf_internal and define __asprintf macro to use it if not NOT_IN_libc. * stdio-common/asprintf.c: Use INTDEF for __asprintf. * include/mntent.h: Declare __setmntent_internal, __getmntent_r_internal, __endmntent_internal. Define __setmntent, __getmntent_r, and __endmntent macros to use these functions if not NOT_IN_libc. * misc/mntent_r.c: Use INTDEF for __setmntent, __getmntent_r, and __endmntent. * include/math.h: Declare __finite_internal, __finitef_internal, and __finitel_internal. Redefine isfinite macro if in libc or libm using these functions. * sysdeps/generic/s_ldexp.c: Use INTUSE for __finite calls. * sysdeps/generic/s_ldexpf.c: Use INTUSE for __finitef calls. * sysdeps/generic/s_ldexpl.c: Use INTUSE for __finitel calls. * sysdeps/i386/fpu/s_finite.S: Define _internal alias. * sysdeps/i386/fpu/s_finitef.S: Likewise. * sysdeps/i386/fpu/s_finitel.S: Likewise. * sysdeps/ieee754/dbl-64/s_finite.c: Likewise. * sysdeps/ieee754/flt-32/s_finitef.c: Likewise. * sysdeps/ieee754/ldbl-128/s_finitel.c: Likewise. * sysdeps/ieee754/ldbl-96/s_finitel.c: Likewise. * include/fcntl.h: Declare __fcntl_internal. Define __fcntl macro to use this function if not NOT_IN_libc. * libio/iofdopen.c (_IO_fcntl): Use INTUSE. * sysdeps/generic/fcntl.c: Use INTDEF for __fcntl. * sysdeps/mach/hurd/fcntl.c: Likewise. * sysdeps/unix/sysv/aix/fcntl.c: Likewise. * sysdeps/unix/sysv/linux/i386/fcntl.c: Likewise. * include/argz.h: Declare __argz_count_internal and __argz_stringify_internal. * intl/l10nflist.c [_LIBC]: Use INTUSE for __argz_count and __argz_stringify. * string/argz-count.c: Use INTDEF for __argz_count. * string/argz-stringify.c: Use INTDEF for __argz_stringify. * include/stdlib.h: Declare __cxa_atexit_internal and define __cxa_atexit macro if not NOT_IN_libc. * stdlib/cxa_atexit.c: Use INTDEF for __cxa_atexit. * dlfcn/Makefile: Define NOT_IN_libc when compiling modcxaatexit.c. * assert/assert.c: Use INTDEF for __assert_fail. * assert/__assert.c: Use INTUSE for call to __assert_fail. * include/assert.h: Declare __assert_fail_internal.
2002-04-09 20:36:24 +00:00
INTDEF(__cxa_atexit)
/* We change global data, so we need locking. */
__libc_lock_define_initialized (static, lock)
static struct exit_function_list initial;
struct exit_function_list *__exit_funcs = &initial;
uint64_t __new_exitfn_called;
struct exit_function *
__new_exitfn (void)
{
struct exit_function_list *p = NULL;
struct exit_function_list *l;
struct exit_function *r = NULL;
size_t i = 0;
__libc_lock_lock (lock);
for (l = __exit_funcs; l != NULL; p = l, l = l->next)
{
for (i = l->idx; i > 0; --i)
if (l->fns[i - 1].flavor != ef_free)
break;
if (i > 0)
break;
/* This block is completely unused. */
l->idx = 0;
}
if (l == NULL || i == sizeof (l->fns) / sizeof (l->fns[0]))
{
/* The last entry in a block is used. Use the first entry in
the previous block if it exists. Otherwise create a new one. */
if (p == NULL)
{
assert (l != NULL);
p = (struct exit_function_list *)
calloc (1, sizeof (struct exit_function_list));
if (p != NULL)
{
p->next = __exit_funcs;
__exit_funcs = p;
}
}
if (p != NULL)
{
r = &p->fns[0];
p->idx = 1;
}
}
else
{
/* There is more room in the block. */
r = &l->fns[i];
l->idx = i + 1;
}
/* Mark entry as used, but we don't know the flavor now. */
if (r != NULL)
{
r->flavor = ef_us;
++__new_exitfn_called;
}
__libc_lock_unlock (lock);
return r;
}