thodg/libgit2/src/git/thread-utils.h

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• Hash : 36f0f61f
  Author :
  Date : 2008-11-18T19:06:25
  

  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>
  

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• src/git/thread-utils.h

• #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__ */
  

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