diff options
Diffstat (limited to 'src/port/getrusage.c')
-rw-r--r-- | src/port/getrusage.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/port/getrusage.c b/src/port/getrusage.c new file mode 100644 index 00000000000..14d37480460 --- /dev/null +++ b/src/port/getrusage.c @@ -0,0 +1,58 @@ +/* $Id: getrusage.c,v 1.1 2002/07/18 04:13:59 momjian Exp $ */ + +#include <stdio.h> +#include <errno.h> +#include "rusagestub.h" + +/* This code works on: + * univel + * solaris_i386 + * sco + * solaris_sparc + * svr4 + * hpux 9.* + * which currently is all the supported platforms that don't have a + * native version of getrusage(). So, if configure decides to compile + * this file at all, we just use this version unconditionally. + */ + +int +getrusage(int who, struct rusage * rusage) +{ + struct tms tms; + int tick_rate = CLK_TCK; /* ticks per second */ + clock_t u, + s; + + if (rusage == (struct rusage *) NULL) + { + errno = EFAULT; + return -1; + } + if (times(&tms) < 0) + { + /* errno set by times */ + return -1; + } + switch (who) + { + case RUSAGE_SELF: + u = tms.tms_utime; + s = tms.tms_stime; + break; + case RUSAGE_CHILDREN: + u = tms.tms_cutime; + s = tms.tms_cstime; + break; + default: + errno = EINVAL; + return -1; + } +#define TICK_TO_SEC(T, RATE) ((T)/(RATE)) +#define TICK_TO_USEC(T,RATE) (((T)%(RATE)*1000000)/RATE) + rusage->ru_utime.tv_sec = TICK_TO_SEC(u, tick_rate); + rusage->ru_utime.tv_usec = TICK_TO_USEC(u, tick_rate); + rusage->ru_stime.tv_sec = TICK_TO_SEC(s, tick_rate); + rusage->ru_stime.tv_usec = TICK_TO_USEC(u, tick_rate); + return 0; +} |