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| author | Gabriel Scherer <gabriel.scherer@gmail.com> | 2014-12-27 14:41:49 +0000 |
|---|---|---|
| committer | Gabriel Scherer <gabriel.scherer@gmail.com> | 2014-12-27 14:41:49 +0000 |
| commit | 7ca29ef3f7ada4eefae4f6c58e77c92e6587ce69 (patch) | |
| tree | e3656320266b1d090e1fed75c498980330768400 /byterun/caml/signals_machdep.h | |
| parent | 65758c08dde5a5e5e379669f82a891f8e7699132 (diff) | |
PR#5887: move the byterun/*.h headers to byterun/caml/*.h to avoid header name clashes
(Jérôme Vouillon and Adrien Nader and Peter Zotov)
git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@15757 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Diffstat (limited to 'byterun/caml/signals_machdep.h')
| -rw-r--r-- | byterun/caml/signals_machdep.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/byterun/caml/signals_machdep.h b/byterun/caml/signals_machdep.h new file mode 100644 index 000000000..4987e2f6a --- /dev/null +++ b/byterun/caml/signals_machdep.h @@ -0,0 +1,60 @@ +/***********************************************************************/ +/* */ +/* OCaml */ +/* */ +/* Xavier Leroy and Damien Doligez, INRIA Rocquencourt */ +/* */ +/* Copyright 1996 Institut National de Recherche en Informatique et */ +/* en Automatique. All rights reserved. This file is distributed */ +/* under the terms of the GNU Library General Public License, with */ +/* the special exception on linking described in file ../LICENSE. */ +/* */ +/***********************************************************************/ + +/* Processor-specific operation: atomic "read and clear" */ + +#ifndef CAML_SIGNALS_MACHDEP_H +#define CAML_SIGNALS_MACHDEP_H + +#if defined(__GNUC__) && defined(__i386__) + +#define Read_and_clear(dst,src) \ + asm("xorl %0, %0; xchgl %0, %1" \ + : "=r" (dst), "=m" (src) \ + : "m" (src)) + +#elif defined(__GNUC__) && defined(__x86_64__) + +#define Read_and_clear(dst,src) \ + asm("xorq %0, %0; xchgq %0, %1" \ + : "=r" (dst), "=m" (src) \ + : "m" (src)) + +#elif defined(__GNUC__) && defined(__ppc__) + +#define Read_and_clear(dst,src) \ + asm("0: lwarx %0, 0, %1\n\t" \ + "stwcx. %2, 0, %1\n\t" \ + "bne- 0b" \ + : "=&r" (dst) \ + : "r" (&(src)), "r" (0) \ + : "cr0", "memory") + +#elif defined(__GNUC__) && defined(__ppc64__) + +#define Read_and_clear(dst,src) \ + asm("0: ldarx %0, 0, %1\n\t" \ + "stdcx. %2, 0, %1\n\t" \ + "bne- 0b" \ + : "=&r" (dst) \ + : "r" (&(src)), "r" (0) \ + : "cr0", "memory") + +#else + +/* Default, non-atomic implementation */ +#define Read_and_clear(dst,src) ((dst) = (src), (src) = 0) + +#endif + +#endif /* CAML_SIGNALS_MACHDEP_H */ |