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glibc  2.9
getsysstats.c
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00001 /* Determine various system internal values, Linux/Alpha version.
00002    Copyright (C) 1999 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Andreas Schwab <schwab@suse.de>
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 
00022 /* We need to define a special parser for /proc/cpuinfo.  */
00023 #define GET_NPROCS_PARSER(FP, BUFFER, RESULT)                            \
00024   do                                                              \
00025     {                                                             \
00026       /* Find the line that contains the information about the number of   \
00027         active cpus.  We don't have to fear extremely long lines since          \
00028         the kernel will not generate them.  8192 bytes are really enough. \
00029         If there is no "CPUs ..." line then we are on a UP system.  */          \
00030       (RESULT) = 1;                                               \
00031       while (fgets_unlocked (BUFFER, sizeof (BUFFER), FP) != NULL)       \
00032        if ((sscanf (BUFFER, "cpus active : %d", &(RESULT)) == 1)         \
00033            || (sscanf (BUFFER, "CPUs probed %*d active %d",              \
00034                      &(RESULT)) == 1))                            \
00035          break;                                                   \
00036     }                                                             \
00037   while (0)
00038 
00039 
00040 /* On the Alpha we can distinguish between the number of configured and
00041    active cpus.  */
00042 #define GET_NPROCS_CONF_PARSER(FP, BUFFER, RESULT)                       \
00043   do                                                              \
00044     {                                                             \
00045       /* Find the line that contains the information about the number of   \
00046         probed cpus.  We don't have to fear extremely long lines since          \
00047         the kernel will not generate them.  8192 bytes are really enough. \
00048         If there is no "CPUs ..." line then we are on a UP system.  */          \
00049       (RESULT) = 1;                                               \
00050       while (fgets_unlocked ((BUFFER), sizeof (BUFFER), (FP)) != NULL)          \
00051        if ((sscanf (buffer, "cpus detected : %d", &(RESULT)) == 1)       \
00052            || (sscanf (buffer, "CPUs probed %d", &(RESULT)) == 1))       \
00053          break;                                                   \
00054     }                                                             \
00055   while (0)
00056 
00057 #include <sysdeps/unix/sysv/linux/getsysstats.c>