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

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• Hash : ae234862
  Author :
  Date : 2008-11-18T22:20:15
  

  Add an embryo of a TLS-aware error handling system
  
  This adds the per-thread global variable git_errno to the
  system, which callers can examine to get information about
  an error.
  
  Two helper functions are added to reduce LoC-count for the
  library code itself.
  
  Also, some exceptions are made for running sparse on GIT_TLS
  definitions, since it doesn't grok thread-local variables at
  all.
  
  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
  
  /* sparse doesn't grok thread-local variables */
  #ifdef SPARSE_IS_RUNNING
  # undef GIT_HAS_TLS
  # undef GIT_TLS
  # define GIT_TLS
  #endif
  
  #endif /* INCLUDE_git_thread_utils_h__ */
  

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