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Improved NOTIFY system: fixed a minor error, ignore pending notifications

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on SENDREC system calls. To be done: resource (buffer pool) management;
make it structurally impossible to run out of buffers.
This commit is contained in:
Jorrit Herder
2005-05-27 12:44:14 +00:00
parent 77c3213948
commit c2be104821
11 changed files with 110 additions and 102 deletions
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12
kernel/main.c
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@@ -29,7 +29,7 @@
/* Prototype declarations for PRIVATE functions. */
FORWARD _PROTOTYPE( void announce, (void));
FORWARD _PROTOTYPE( void shutdown, (int how));
FORWARD _PROTOTYPE( void shutdown, (timer_t *tp));
#define STOP_TICKS (5*HZ) /* time allowed to stop */
@@ -248,10 +248,10 @@ int how; /* 0 = halt, 1 = reboot, 2 = panic!, ... */
tmr_arg(&shutdown_timer)->ta_int = how; /* pass how in timer */
if (skip_stop_sequence) { /* set in exception() */
kprintf("\nAn exception occured; skipping stop sequence.\n", NO_ARG);
shutdown(how); /* TTY isn't scheduled */
shutdown(&shutdown_timer); /* TTY isn't scheduled */
} else {
kprintf("\nNotifying system services about MINIX shutdown.\n", NO_ARG);
stop_sequence(&shutdown_timer);
set_timer(&shutdown_timer, get_uptime(), stop_sequence);
}
}
@@ -302,7 +302,7 @@ timer_t *tp;
p = BEG_PROC_ADDR;
level = level - 1;
if (level == P_TASK) { /* done; tasks must remain alive */
shutdown(tmr_arg(tp)->ta_int);
shutdown(tp);
/* no return */
return;
}
@@ -313,13 +313,15 @@ timer_t *tp;
/*==========================================================================*
* shutdown *
*==========================================================================*/
PRIVATE void shutdown(int how)
PRIVATE void shutdown(tp)
timer_t *tp;
{
/* This function is called from prepare_shutdown or stop_sequence to bring
* down MINIX. How to shutdown is in the argument: RBT_REBOOT, RBT_HALT,
* RBT_RESET.
*/
static u16_t magic = STOP_MEM_CHECK;
int how = tmr_arg(tp)->ta_int;
/* Now mask all interrupts, including the clock, and stop the clock. */
outb(INT_CTLMASK, ~0);