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374976dd13
[BZ #6471] * sysdeps/unix/sysv/linux/shmat.c (shmat): Test for syscall errors properly. * sysdeps/unix/sysv/linux/sparc/getshmlba.c: New file. * sysdeps/unix/sysv/linux/sparc/Makefile: Add getshmlba to sysdep_routines when subdir is sysvipc. * sysdeps/unix/sysv/linux/sparc/bits/shm.h (SHMLBA): Use new __getshmlba helper.
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
/* Copyright (C) 2012
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <unistd.h>
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#include <sys/shm.h>
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#include <ldsodefs.h>
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int
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__getshmlba (void)
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{
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uint64_t hwcap = GLRO(dl_hwcap);
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int pgsz = GLRO(dl_pagesize);
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if (hwcap & HWCAP_SPARC_V9)
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{
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if (pgsz < (16 * 1024))
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return 16 * 1024;
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else
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return pgsz;
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}
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else if (!(hwcap & HWCAP_SPARC_FLUSH))
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return 64 * 1024;
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else
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return 256 * 1024;
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}
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