kc3-lang/kc3/libkc3/ncpu.c

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  Commit

• Hash : bb3d880e
  Author : Thomas de Grivel
  Date : 2026-01-05T21:46:43
  

  pthread: cannot copy a pthread_rwlock_t nor a pthread_mutex_t they have to be initialized in-place. added a self pointer for consistency.
  

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• libkc3/ncpu.c

• /* kc3
   * Copyright from 2022 to 2025 kmx.io <contact@kmx.io>
   *
   * Permission is hereby granted to use this software granted the above
   * copyright notice and this permission paragraph are included in all
   * copies and substantial portions of this software.
   *
   * THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
   * PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
   * AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
   * THIS SOFTWARE.
   */
  #include <string.h>
  #include <sys/types.h>
  
  #if (defined(__APPLE__) ||      \
       defined(__FreeBSD__) ||    \
       defined(__NetBSD__) ||     \
       defined(__OpenBSD__))
  # include <sys/sysctl.h>
  #else
  # if ! (defined(WIN32) || defined(WIN64))
  #  include <sys/sysinfo.h>
  # endif
  #endif
  
  #include "assert.h"
  #include "io.h"
  #include "ncpu.h"
  #include "tag.h"
  
  s_tag * ncpu_tag (s_tag *ncpu)
  {
  #if ! HAVE_PTHREAD
    tag_init_u8(ncpu, 1);
  #else
  # if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
    {
      s32 mib[2];
      s32 hw_ncpu;
      uw len;
      mib[0] = CTL_HW;
      mib[1] = HW_NCPU;
      len = sizeof(hw_ncpu);
      if (sysctl(mib, 2, &hw_ncpu, &len, NULL, 0) == -1){
        err_puts("env_globals_init: sysctl(hw.ncpu)");
        assert(! "env_globals_init: sysctl(hw.ncpu)");
        return NULL;
      }
      tag_init_s32(ncpu, hw_ncpu);
      tag_integer_reduce(ncpu, ncpu);
    }
  # elif defined(HAVE_ANDROID)
    tag_init_s32(ncpu, sysconf(_SC_NPROCESSORS_ONLN));
  # else
    tag_init_s32(ncpu, get_nprocs());
  # endif
  #endif
    return ncpu;
  }
  
  u32 ncpu_u32 (void)
  {
  #if ! HAVE_PTHREAD
    return 1;
  #else
  # if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
    {
      s32 mib[2];
      s32 hw_ncpu;
      uw len;
      mib[0] = CTL_HW;
      mib[1] = HW_NCPU;
      len = sizeof(hw_ncpu);
      if (sysctl(mib, 2, &hw_ncpu, &len, NULL, 0) == -1){
        err_puts("ncpu_u32: sysctl: hw.ncpu");
        assert(! "ncpu_u32: sysctl: hw.ncpu");
        return 1;
      }
      if (hw_ncpu <= 0) {
        err_puts("ncpu_u32: sysctl: hw.ncpu <= 0");
        assert(! "ncpu_u32: sysctl: hw.ncpu <= 0");
        return 1;
      }
      return hw_ncpu;
    }
  # elif defined(HAVE_ANDROID)
    return sysconf(_SC_NPROCESSORS_ONLN);
  # else
    return get_nprocs();
  # endif
  #endif
  }
  

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