empire/empserver
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Redesign interface to machine-dependent code to cleanse lwp.c of

Browse source 
machine-dependencies:
(lwpNewContext): New, factored out of lwpCreate().
(lwpSwitchContext): New, factored out of lwpReschedule().
(LWP_EXTRASTACK, STKALIGN, lwpInitContext, lwpSave, lwpRestore): Move
to arch.c.  Remove for UCONTEXT, else static linkage unless macro or
AIX32.

(lwpReschedule): Skip lwpStatus() when not actually switching.

(LwpStackGrowsDown): New.
(lwpInitSystem): Initialize it.
(lwpStackCheck, lwpStackCheckUsed): Use it.
This commit is contained in:
Markus Armbruster 2005-12-10 19:28:24 +00:00
parent 2218a7a9a1
commit 9e3db08fda
3 changed files with 189 additions and 148 deletions
Download patch file Download diff file Expand all files Collapse all files

41
src/lib/lwp/lwpint.h
View file

@ -73,50 +73,15 @@ struct lwpSem {
char *name;
};
#ifdef UCONTEXT
void lwpInitContext(struct lwpProc *, stack_t *);
#define lwpSave(x) getcontext(&(x))
#define lwpRestore(x) setcontext(&(x))
#else /* !UCONTEXT */
#if defined(hpux) && !defined(hpc)
void lwpInitContext(volatile struct lwpProc * volatile, void *);
#else
void lwpInitContext(struct lwpProc *, void *);
#endif
#if defined(hpc)
int lwpSave(jmp_buf);
#define lwpRestore(x) longjmp(x, 1)
#elif defined(hpux) || defined(AIX32) || defined(ALPHA)
int lwpSave(jmp_buf);
void lwpRestore(jmp_buf);
#elif defined(SUN4)
#define lwpSave(x) _setjmp(x)
#define lwpRestore(x) _longjmp(x, 1)
#else
#define lwpSave(x) setjmp(x)
#define lwpRestore(x) longjmp(x, 1)
#endif
#endif /* !UCONTEXT */
#ifdef AIX32
/* AIX needs 12 extra bytes above the stack; we add it here */
#define LWP_EXTRASTACK 3*sizeof(long)
#else
#define LWP_EXTRASTACK 0
#endif
#define LWP_REDZONE 1024 /* make this a multiple of 1024 */
/* XXX Note that this assumes sizeof(long) == 4 */
#define LWP_CHECKMARK 0x5a5a5a5aL
#ifdef hpux
#define STKALIGN 64
#else
#define STKALIGN sizeof(double)
#endif
extern int LwpStackGrowsDown;
/* internal routines */
int lwpNewContext(struct lwpProc *, int);
void lwpSwitchContext(struct lwpProc *, struct lwpProc *);
void lwpAddTail(struct lwpQueue *, struct lwpProc *);
struct lwpProc *lwpGetFirst(struct lwpQueue *);
void lwpReady(struct lwpProc *);