git://sourceware.org / newlib-cygwin.git / blame
| Commit | Line | Data |
|---|---|---|
| 1fd5e000 CF |
1 | /* sysconf.cc |
| 2 | ||
| ce006ffa | 3 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. |
| 1fd5e000 CF |
4 | |
| 5 | This file is part of Cygwin. | |
| 6 | ||
| 7 | This software is a copyrighted work licensed under the terms of the | |
| 8 | Cygwin license. Please consult the file "CYGWIN_LICENSE" for | |
| 9 | details. */ | |
| 10 | ||
| 4c8d72de | 11 | #include "winsup.h" |
| 1fd5e000 CF |
12 | #include <unistd.h> |
| 13 | #include <errno.h> | |
| 14 | #include <time.h> | |
| 15 | #include <limits.h> | |
| 8c8d0db4 | 16 | #include <ntdef.h> |
| 6b91b8d5 | 17 | #include "security.h" |
| bccd5e0d | 18 | #include "fhandler.h" |
| 47063f00 | 19 | #include "path.h" |
| e2ebe117 | 20 | #include "dtable.h" |
| 9e2baf8d | 21 | #include "cygerrno.h" |
| df63bd49 | 22 | #include "cygheap.h" |
| 8c8d0db4 | 23 | #include "ntdll.h" |
| 1fd5e000 CF |
24 | |
| 25 | /* sysconf: POSIX 4.8.1.1 */ | |
| 26 | /* Allows a portable app to determine quantities of resources or | |
| 27 | presence of an option at execution time. */ | |
| 28 | long int | |
| 29 | sysconf (int in) | |
| 30 | { | |
| 31 | switch (in) | |
| 32 | { | |
| 33 | case _SC_ARG_MAX: | |
| 34 | /* FIXME: what's the right value? _POSIX_ARG_MAX is only 4K */ | |
| 35 | return 1048576; | |
| 36 | case _SC_OPEN_MAX: | |
| 1457739a | 37 | return getdtablesize (); |
| 1fd5e000 | 38 | case _SC_PAGESIZE: |
| 4cf2c0e0 | 39 | return getpagesize (); |
| 1fd5e000 CF |
40 | case _SC_CLK_TCK: |
| 41 | return CLOCKS_PER_SEC; | |
| 42 | case _SC_JOB_CONTROL: | |
| 43 | return _POSIX_JOB_CONTROL; | |
| 44 | case _SC_CHILD_MAX: | |
| 45 | return CHILD_MAX; | |
| 46 | case _SC_NGROUPS_MAX: | |
| 47 | return NGROUPS_MAX; | |
| 48 | case _SC_SAVED_IDS: | |
| 49 | return _POSIX_SAVED_IDS; | |
| 50 | case _SC_VERSION: | |
| 51 | return _POSIX_VERSION; | |
| 52 | #if 0 /* FIXME -- unimplemented */ | |
| 53 | case _SC_TZNAME_MAX: | |
| 54 | return _POSIX_TZNAME_MAX; | |
| 55 | case _SC_STREAM_MAX: | |
| 56 | return _POSIX_STREAM_MAX; | |
| 57 | #endif | |
| 8c8d0db4 CV |
58 | case _SC_NPROCESSORS_CONF: |
| 59 | case _SC_NPROCESSORS_ONLN: | |
| ba946828 | 60 | if (!wincap.supports_smp ()) |
| 8c8d0db4 CV |
61 | return 1; |
| 62 | /*FALLTHRU*/ | |
| 63 | case _SC_PHYS_PAGES: | |
| 64 | case _SC_AVPHYS_PAGES: | |
| cb4589f4 | 65 | if (wincap.supports_smp ()) |
| ba946828 CV |
66 | { |
| 67 | NTSTATUS ret; | |
| 68 | SYSTEM_BASIC_INFORMATION sbi; | |
| 69 | if ((ret = NtQuerySystemInformation (SystemBasicInformation, | |
| 70 | (PVOID) &sbi, | |
| 71 | sizeof sbi, NULL)) | |
| 72 | != STATUS_SUCCESS) | |
| 73 | { | |
| 74 | __seterrno_from_win_error (RtlNtStatusToDosError (ret)); | |
| c90e1cf1 CF |
75 | debug_printf ("NtQuerySystemInformation: ret = %d, " |
| 76 | "Dos(ret) = %d", | |
| 77 | ret, RtlNtStatusToDosError (ret)); | |
| ba946828 CV |
78 | return -1; |
| 79 | } | |
| 80 | switch (in) | |
| 81 | { | |
| 82 | case _SC_NPROCESSORS_CONF: | |
| 83 | return sbi.NumberProcessors; | |
| 84 | case _SC_NPROCESSORS_ONLN: | |
| 85 | return sbi.ActiveProcessors; | |
| 86 | case _SC_PHYS_PAGES: | |
| 87 | return sbi.NumberOfPhysicalPages; | |
| 88 | case _SC_AVPHYS_PAGES: | |
| 89 | return sbi.HighestPhysicalPage - sbi.LowestPhysicalPage + 1; | |
| 90 | } | |
| 91 | } | |
| 9c510edc | 92 | break; |
| 1fd5e000 CF |
93 | } |
| 94 | ||
| 95 | /* Invalid input or unimplemented sysconf name */ | |
| 96 | set_errno (EINVAL); | |
| 97 | return -1; | |
| 98 | } |