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New NOTIFY system call! Queued at kernel. Duplicate messages (with same source

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and type) are overwritten with newer flags/ arguments. The interface from
within the kernel is lock_notify(). User processes can make a system call with
notify(). NOTIFY fully replaces the old notification mechanism.
This commit is contained in:
Jorrit Herder
2005-05-24 10:06:17 +00:00
parent 80e38daead
commit ccd17ecfed
22 changed files with 304 additions and 377 deletions
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9
kernel/glo.h
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@@ -23,17 +23,12 @@ EXTERN struct machine machine; /* machine information for users */
EXTERN struct kmessages kmess; /* diagnostic messages in kernel */
EXTERN struct memory mem[NR_MEMS]; /* base and size of chunks of memory */
/* Low level notifications may be put on the 'held' queue to prevent races. */
EXTERN struct proc *held_head; /* head of queue of held-up interrupts */
EXTERN struct proc *held_tail; /* tail of queue of held-up interrupts */
EXTERN unsigned char k_reenter; /* kernel reentry count (entry count less 1)*/
EXTERN unsigned char switching; /* nonzero if process switching in progress */
/* Process table. Here to stop too many things having to include proc.h. */
EXTERN struct proc *proc_ptr; /* pointer to currently running process */
/* Miscellaneous. */
EXTERN unsigned lost_ticks; /* clock ticks counted outside the clock task */
EXTERN char k_reenter; /* kernel reentry count (entry count less 1) */
EXTERN unsigned lost_ticks; /* clock ticks counted outside clock task */
#if (CHIP == INTEL)