Mercurial > hg > Members > tobaru > cbc > CbC_llvm

annotate cmake/modules/CheckAtomic.cmake @ 15:66597e792247

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
minor fix
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Tue, 17 Sep 2013 21:32:34 +0900
parents 9ad51c7bc036
children 60c9769439b8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
1 # atomic builtins are required for threading support.
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
2
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
3 INCLUDE(CheckCXXSourceCompiles)
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
4
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
5 CHECK_CXX_SOURCE_COMPILES("
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
6 #ifdef _MSC_VER
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
7 #include <windows.h>
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
8 #endif
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
9 int main() {
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
10 #ifdef _MSC_VER
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
11 volatile LONG val = 1;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
12 MemoryBarrier();
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
13 InterlockedCompareExchange(&val, 0, 1);
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
14 InterlockedIncrement(&val);
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
15 InterlockedDecrement(&val);
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
16 #else
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
17 volatile unsigned long val = 1;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
18 __sync_synchronize();
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
19 __sync_val_compare_and_swap(&val, 1, 0);
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
20 __sync_add_and_fetch(&val, 1);
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
21 __sync_sub_and_fetch(&val, 1);
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
22 #endif
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
23 return 0;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
24 }
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
25 " LLVM_HAS_ATOMICS)
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
26
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
27 if( NOT LLVM_HAS_ATOMICS )
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
28 message(STATUS "Warning: LLVM will be built thread-unsafe because atomic builtins are missing")
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
29 endif()