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| author | Andreas Ericsson <ae@op5.se> | 2008-11-18 19:06:25 +0100 |
|---|---|---|
| committer | Shawn O. Pearce <spearce@spearce.org> | 2008-11-18 10:32:53 -0800 |
| commit | 36f0f61fc8578478a9dc9b33a1a0d07cdb98a5e5 (patch) | |
| tree | 14be9ebaa30a1d6085e889eecaf2a24968eea24e /src/git | |
| parent | a57e9a8cc15b61ae1ab908b362fd829b3e36e513 (diff) | |
| download | libgit2-36f0f61fc8578478a9dc9b33a1a0d07cdb98a5e5.tar.gz | |
Add compiler/platform agnostic thread-local storage
It doesn't cover all cases, but we can work on those as
we go along. For now, gcc, MSVC++, Intel C/C++, IBM XL C/C++,
Sun Studio C/C++ and Borland C++ Builder are the supported
compilers (although we boldly assume that they all are of
a recent enough version to support thread-local storage).
This is intended to be used in upcoming patches that implement
graceful (but TLS-dependant) error-handling in the library.
As an added bonus, we also bring the online_cpus() function
from git.git to detect the number of usable cpu's.
Signed-off-by: Andreas Ericsson <ae@op5.se>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Diffstat (limited to 'src/git')
| -rw-r--r-- | src/git/thread-utils.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/git/thread-utils.h b/src/git/thread-utils.h new file mode 100644 index 000000000..f2ddf1eec --- /dev/null +++ b/src/git/thread-utils.h @@ -0,0 +1,25 @@ +#ifndef INCLUDE_git_thread_utils_h__ +#define INCLUDE_git_thread_utils_h__ +/* + * How TLS works is compiler+platform dependant + * Sources: http://en.wikipedia.org/wiki/Thread-Specific_Storage + * http://predef.sourceforge.net/precomp.html + */ +#define GIT_HAS_TLS 1 +#if defined(__GNUC__) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || \ + defined(__xlc__) || defined(__xlC__) +# define GIT_TLS __thread +#elif defined(__INTEL_COMPILER) +# if defined(_WIN32) || defined(_WIN32_CE) +# define GIT_TLS __declspec(thread) +# else +# define GIT_TLS __thread +# endif +#elif defined(_WIN32) || defined(_WIN32_CE) || defined(__BORLANDC__) +# define GIT_TLS __declspec(thread) +#else +# undef GIT_HAS_TLS +# define GIT_TLS /* nothing: tls vars are thread-global */ +#endif + +#endif /* INCLUDE_git_thread_utils_h__ */ |