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author | Vineet Gupta <vgupta@synopsys.com> | 2020-05-05 12:53:41 -0700 |
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committer | Vineet Gupta <vgupta@synopsys.com> | 2020-05-06 13:07:12 -0700 |
commit | 1270fbaaeebe642db335fccaaf98c82e6647cc0d (patch) | |
tree | ee000a76b8b7c0c22ea9270df02e82d5eeae42c6 /sysdeps/unix/sysv/linux/bits | |
parent | 99a327f801f7dbc8ca33b202718ef5bd0bf02ba5 (diff) | |
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semaphore: consolidate arch headers into a generic one
This consolidates the copy-pasted arch specific semaphore header into
single version (based on s390) which suffices 32-bit and and 64-bit
arch/ABI based on the canonical WORDSIZE.
For now I've left out arches which use alternate defines to choose for
32 vs 64-bit builds (aarch64, mips) which in theory can also use the same
header.
Passes build-many for
aarch64-linux-gnu arm-linux-gnueabi arm-linux-gnueabihf
riscv64-linux-gnu-rv64imac-lp64 riscv64-linux-gnu-rv64imafdc-lp64
x86_64-linux-gnu microblaze-linux-gnu nios2-linux-gnu
Suggested-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/unix/sysv/linux/bits')
-rw-r--r-- | sysdeps/unix/sysv/linux/bits/semaphore.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/bits/semaphore.h b/sysdeps/unix/sysv/linux/bits/semaphore.h new file mode 100644 index 0000000000..84a55b8a95 --- /dev/null +++ b/sysdeps/unix/sysv/linux/bits/semaphore.h @@ -0,0 +1,39 @@ +/* Generic POSIX semaphore type layout + Copyright (C) 1995-2020 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef _SEMAPHORE_H +# error "Never use <bits/semaphore.h> directly; include <semaphore.h> instead." +#endif + +#include <bits/wordsize.h> + +#if __WORDSIZE == 64 +# define __SIZEOF_SEM_T 32 +#else +# define __SIZEOF_SEM_T 16 +#endif + +/* Value returned if `sem_open' failed. */ +#define SEM_FAILED ((sem_t *) 0) + + +typedef union +{ + char __size[__SIZEOF_SEM_T]; + long int __align; +} sem_t; |