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New P_BLOCKEDON for kernel - a macro that encodes the "who is this

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process waiting for" logic, which is duplicated a few times in the
kernel. (For a new feature for top.)

Introducing it and throwing out ESRCDIED and EDSTDIED (replaced by
EDEADSRCDST - so we don't have to care which part of the blocking is
failing in system.c) simplifies some code in the kernel and callers that
check for E{DEADSRCDST,ESRCDIED,EDSTDIED}, but don't care about the
difference, a fair bit, and more significantly doesn't duplicate the
'blocked-on' logic.
This commit is contained in:
Ben Gras
2010-03-03 15:32:26 +00:00
parent cbd276e4ce
commit 18924ea563
4 changed files with 38 additions and 35 deletions
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13
kernel/arch/i386/system.c
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@@ -315,7 +315,7 @@ PRIVATE void ser_debug(int c)
PRIVATE void printslot(struct proc *pp, int level)
{
struct proc *depproc = NULL;
int dep = NONE;
endpoint_t dep;
#define COL { int i; for(i = 0; i < level; i++) printf("> "); }
if(level >= NR_PROCS) {
@@ -331,15 +331,8 @@ PRIVATE void printslot(struct proc *pp, int level)
pp->p_sys_time, pp->p_cycles.hi, pp->p_cycles.lo, pp->p_seg.p_cr3,
rtsflagstr(pp->p_rts_flags), miscflagstr(pp->p_misc_flags));
if(pp->p_rts_flags & RTS_SENDING) {
dep = pp->p_sendto_e;
kprintf(" to: ");
} else if(pp->p_rts_flags & RTS_RECEIVING) {
dep = pp->p_getfrom_e;
kprintf(" from: ");
}
if(dep != NONE) {
if((dep = P_BLOCKEDON(pp)) != NONE) {
kprintf(" blocked on: ");
if(dep == ANY) {
kprintf(" ANY\n");
} else {