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Modify process semantics; rescheduling is now automatic.

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Add reference-counting to processes.

Add timer_running() test.
This commit is contained in:
Michael Brown
2007-05-26 15:00:56 +00:00
parent 6006bed530
commit 3601103381
5 changed files with 76 additions and 19 deletions
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41
src/include/gpxe/process.h
View File

@@ -8,6 +8,7 @@
*/
#include <gpxe/list.h>
#include <gpxe/refcnt.h>
/** A process */
struct process {
@@ -19,14 +20,46 @@ struct process {
* This method should execute a single step of the process.
* Returning from this method is isomorphic to yielding the
* CPU to another process.
*
* If the process wishes to be executed again, it must re-add
* itself to the run queue using schedule().
*/
void ( * step ) ( struct process *process );
/** Reference counter
*
* If this interface is not part of a reference-counted
* object, this field may be NULL.
*/
struct refcnt *refcnt;
};
extern void schedule ( struct process *process );
extern void process_add ( struct process *process );
extern void process_del ( struct process *process );
extern void step ( void );
/**
* Initialise process without adding to process list
*
* @v process Process
* @v step Process' step() method
*/
static inline __attribute__ (( always_inline )) void
process_init_stopped ( struct process *process,
void ( * step ) ( struct process *process ),
struct refcnt *refcnt ) {
process->step = step;
process->refcnt = refcnt;
}
/**
* Initialise process and add to process list
*
* @v process Process
* @v step Process' step() method
*/
static inline __attribute__ (( always_inline )) void
process_init ( struct process *process,
void ( * step ) ( struct process *process ),
struct refcnt *refcnt ) {
process_init_stopped ( process, step, refcnt );
process_add ( process );
}
#endif /* _GPXE_PROCESS_H */

11
src/include/gpxe/retry.h
View File

@@ -37,4 +37,15 @@ struct retry_timer {
extern void start_timer ( struct retry_timer *timer );
extern void stop_timer ( struct retry_timer *timer );
/**
* Test to see if timer is currently running
*
* @v timer Retry timer
* @ret running Non-zero if timer is running
*/
static inline __attribute__ (( always_inline )) unsigned long
timer_running ( struct retry_timer *timer ) {
return ( timer->start );
}
#endif /* _GPXE_RETRY_H */