projects / exim.git / blame
| Commit | Line | Data |
|---|---|---|
| 61ec970d PH |
1 | /* $Cambridge: exim/src/OS/os.c-GNU,v 1.1 2004/10/06 15:07:39 ph10 Exp $ */ |
| 2 | ||
| 3 | /************************************************* | |
| 4 | * Exim - an Internet mail transport agent * | |
| 5 | *************************************************/ | |
| 6 | ||
| 7 | /* See the file NOTICE for conditions of use and distribution. */ | |
| 8 | ||
| 9 | /* GNU-specific code. This is concatenated onto the generic src/os.c file. | |
| 10 | GNU/Hurd has approximately the same way to determine the load average as NeXT, | |
| 11 | so a variant of this could also be in the generic os.c file. See the GNU EMacs | |
| 12 | getloadavg.c file, from which this snippet was derived. getloadavg.c from Emacs | |
| 13 | is copyrighted by the FSF under the terms of the GPLv2 or any later version. | |
| 14 | Changes are hereby placed under the same license, as requested by the GPL. */ | |
| 15 | ||
| 16 | #ifndef OS_LOAD_AVERAGE | |
| 17 | #define OS_LOAD_AVERAGE | |
| 18 | ||
| 19 | #include <mach.h> | |
| 20 | ||
| 21 | static processor_set_t default_set; | |
| 22 | static int getloadavg_initialized; | |
| 23 | ||
| 24 | int | |
| 25 | os_getloadavg (void) | |
| 26 | { | |
| 27 | host_t host; | |
| 28 | struct processor_set_basic_info info; | |
| 29 | unsigned info_count; | |
| 30 | ||
| 31 | if (!getloadavg_initialized) | |
| 32 | { | |
| 33 | if (processor_set_default (mach_host_self(), &default_set) == KERN_SUCCESS) | |
| 34 | getloadavg_initialized = 1; | |
| 35 | } | |
| 36 | ||
| 37 | if (getloadavg_initialized) | |
| 38 | { | |
| 39 | info_count = PROCESSOR_SET_BASIC_INFO_COUNT; | |
| 40 | if (processor_set_info(default_set, PROCESSOR_SET_BASIC_INFO, &host, | |
| 41 | (processor_set_info_t)&info, &info_count) != KERN_SUCCESS) | |
| 42 | getloadavg_initialized = 0; | |
| 43 | else | |
| 44 | { | |
| 45 | #if LOAD_SCALE == 1000 | |
| 46 | return info.load_average; | |
| 47 | #else | |
| 48 | return (int) (((double) info.load_average * 1000) / LOAD_SCALE)); | |
| 49 | #endif | |
| 50 | } | |
| 51 | } | |
| 52 | ||
| 53 | return -1; | |
| 54 | } | |
| 55 | #endif /* OS_LOAD_AVERAGE */ | |
| 56 | ||
| 57 | /* End of os.c-GNU */ |