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d1c09b2471
This patch implements various atomic and locking routines on RISC-V. We mandate the A extension on Linux-capable RISC-V systems, so this can rely on always having the various atomic instructions availiable. 2018-01-29 Palmer Dabbelt <palmer@sifive.com> * sysdeps/riscv/nptl/bits/pthreadtypes-arch.h: New file. * sysdeps/riscv/nptl/bits/semaphore.h: Likewise. * sysdeps/riscv/nptl/libc-lowlevellock.c: Likewise. * sysdeps/unix/sysv/linux/riscv/atomic-machine.h: Likewise.
34 lines
1.1 KiB
C
34 lines
1.1 KiB
C
/* Machine-specific POSIX semaphore type layouts. RISC-V version.
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Copyright (C) 2002-2018 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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#ifndef _SEMAPHORE_H
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# error "Never use <bits/semaphore.h> directly; include <semaphore.h> instead."
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#endif
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#define __SIZEOF_SEM_T (4 * __SIZEOF_POINTER__)
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/* Value returned if `sem_open' failed. */
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#define SEM_FAILED ((sem_t *) 0)
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typedef union
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{
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char __size[__SIZEOF_SEM_T];
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long int __align;
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} sem_t;
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