thodg/libgit2/src/thread-utils.c

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• Hash : 64a47c01
  Author :
  Date : 2008-12-30T23:21:36
  

  Wrap malloc and friends and report out of memory as GIT_ENOMEM
  
  We now forbid direct use of malloc, strdup or calloc within the
  library and instead use wrapper functions git__malloc, etc. to
  invoke the underlying library malloc and set git_errno to a no
  memory error code if the allocation fails.
  
  In the future once we have pack objects in memory we are likely
  to enhance these routines with garbage collection logic to purge
  cached pack data when allocations fail.  Because the size of the
  function will grow somewhat large, we don't want to mark them for
  inline as gcc tends to aggressively inline, creating larger than
  expected executables.
  
  Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
  

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• src/thread-utils.c

• #include "common.h"
  #include "thread-utils.h"
  
  #ifdef _WIN32
  #  define WIN32_LEAN_AND_MEAN
  #  include <windows.h>
  #elif defined(hpux) || defined(__hpux) || defined(_hpux)
  #  include <sys/pstat.h>
  #endif
  
  /*
   * By doing this in two steps we can at least get
   * the function to be somewhat coherent, even
   * with this disgusting nest of #ifdefs.
   */
  #ifndef _SC_NPROCESSORS_ONLN
  #  ifdef _SC_NPROC_ONLN
  #    define _SC_NPROCESSORS_ONLN _SC_NPROC_ONLN
  #  elif defined _SC_CRAY_NCPU
  #    define _SC_NPROCESSORS_ONLN _SC_CRAY_NCPU
  #  endif
  #endif
  
  int git_online_cpus(void)
  {
  #ifdef _SC_NPROCESSORS_ONLN
  	long ncpus;
  #endif
  
  #ifdef _WIN32
  	SYSTEM_INFO info;
  	GetSystemInfo(&info);
  
  	if ((int)info.dwNumberOfProcessors > 0)
  		return (int)info.dwNumberOfProcessors;
  #elif defined(hpux) || defined(__hpux) || defined(_hpux)
  	struct pst_dynamic psd;
  
  	if (!pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0))
  		return (int)psd.psd_proc_cnt;
  #endif
  
  #ifdef _SC_NPROCESSORS_ONLN
  	if ((ncpus = (long)sysconf(_SC_NPROCESSORS_ONLN)) > 0)
  		return (int)ncpus;
  #endif
  
  	return 1;
  }
  

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