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authorVineet Gupta <vgupta@synopsys.com>2020-05-05 12:53:41 -0700
committerVineet Gupta <vgupta@synopsys.com>2020-05-06 13:07:12 -0700
commit1270fbaaeebe642db335fccaaf98c82e6647cc0d (patch)
treeee000a76b8b7c0c22ea9270df02e82d5eeae42c6 /sysdeps/unix/sysv/linux/bits
parent99a327f801f7dbc8ca33b202718ef5bd0bf02ba5 (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.h39
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;