24ec0d73b5
- introduce new call numbers, names, and field aliases; - initialize request messages to zero for all ABI calls; - format callnr.h in the same way as com.h; - redo call tables in both servers; - remove param.h namespace pollution in the servers; - make brk(2) go to VM directly, rather than through PM; - remove obsolete BRK, UTIME, and WAIT calls; - clean up path copying routine in VFS; - move remaining system calls from libminlib to libc; - correct some errno-related mistakes in libc routines. Change-Id: I2d8ec5d061cd7e0b30c51ffd77aa72ebf84e2565
51 lines
941 B
C
51 lines
941 B
C
/*
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priority.c
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*/
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#include <sys/cdefs.h>
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#include "namespace.h"
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/resource.h>
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#include <lib.h>
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#include <unistd.h>
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#include <string.h>
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#include <stddef.h>
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int getpriority(int which, int who)
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{
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int v;
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message m;
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memset(&m, 0, sizeof(m));
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m.PM_PRIORITY_WHICH = which;
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m.PM_PRIORITY_WHO = who;
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/* GETPRIORITY returns negative for error.
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* Otherwise, it returns the priority plus the minimum
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* priority, to distiginuish from error. We have to
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* correct for this. (The user program has to check errno
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* to see if something really went wrong.)
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*/
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if((v = _syscall(PM_PROC_NR, PM_GETPRIORITY, &m)) < 0) {
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return v;
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}
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return v + PRIO_MIN;
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}
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int setpriority(int which, int who, int prio)
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{
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message m;
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memset(&m, 0, sizeof(m));
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m.PM_PRIORITY_WHICH = which;
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m.PM_PRIORITY_WHO = who;
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m.PM_PRIORITY_PRIO = prio;
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return _syscall(PM_PROC_NR, PM_SETPRIORITY, &m);
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}
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