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(lwpCreate): Clean up the incomprehensible #ifdef jungle. No

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functional changes.
This commit is contained in:
Markus Armbruster 2005-12-05 19:16:59 +00:00
parent e29f288289
commit 5d79a0cf6e
1 changed files with 20 additions and 48 deletions
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68
src/lib/lwp/lwp.c
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@ -202,20 +202,17 @@ struct lwpProc *
lwpCreate(int priority, void (*entry)(void *), int size, int flags, char *name, char *desc, int argc, char **argv, void *ud)
{
struct lwpProc *newp;
int *s, x;
char *s, *sp;
int redsize, x;
#ifdef UCONTEXT
stack_t sp;
#else /* UCONTEXT */
void *sp;
stack_t usp;
#endif /* UCONTEXT */
unsigned long stackp;
if (!(newp = malloc(sizeof(struct lwpProc))))
return 0;
if (flags & LWP_STACKCHECK) {
/* Add a 1K buffer on each side of the stack */
size += 2 * LWP_REDZONE;
}
/* Add a 1K buffer on each side of the stack */
redsize = flags & LWP_STACKCHECK ? LWP_REDZONE : 0;
size += 2 * redsize;
size += LWP_EXTRASTACK;
size += sizeof(stkalign_t);
if (!(s = malloc(size)))
@ -227,50 +224,22 @@ lwpCreate(int priority, void (*entry)(void *), int size, int flags, char *name,
newp->argc = argc;
newp->argv = argv;
newp->ud = ud;
if ((newp->flags & LWP_STACKCHECK) == 0) {
stackp = growsdown((void *)&x)
? (unsigned long)s + size - sizeof(stkalign_t) - LWP_EXTRASTACK
: (unsigned long)s + LWP_EXTRASTACK;
#ifdef UCONTEXT
sp.ss_sp = (void *)(stackp & -sizeof(stkalign_t));
sp.ss_size = size;
sp.ss_flags = 0;
#else /* UCONTEXT */
sp = (void *)(stackp & -sizeof(stkalign_t));
#endif /* UCONTEXT */
if (growsdown(&x)) {
sp = s + size - sizeof(stkalign_t) - LWP_EXTRASTACK - redsize;
sp = (char *)0 + ((sp - (char *)0) & -sizeof(stkalign_t));
newp->lowmark = sp + LWP_EXTRASTACK;
newp->himark = s;
} else {
if (growsdown(&x)) {
/* round address off to stkalign_t */
stackp = ((long)s) + size - LWP_REDZONE -
LWP_EXTRASTACK - sizeof(stkalign_t);
#ifdef UCONTEXT
sp.ss_sp = (void *)(stackp & -sizeof(stkalign_t));
sp.ss_size = size;
sp.ss_flags = 0;
newp->lowmark = (void *)(((long)sp.ss_sp) + LWP_EXTRASTACK);
#else /* UCONTEXT */
sp = (void *)(stackp & -sizeof(stkalign_t));
newp->lowmark = (void *)(((long)sp) + LWP_EXTRASTACK);
#endif /* UCONTEXT */
newp->himark = s;
} else {
stackp = ((long)s) + LWP_REDZONE + LWP_EXTRASTACK;
#ifdef UCONTEXT
sp.ss_sp = (void *)(((long)stackp) & -sizeof(stkalign_t));
sp.ss_size = size;
sp.ss_flags = 0;
#else /* UCONTEXT */
sp = (void *)(((long)stackp) & -sizeof(stkalign_t));
#endif /* UCONTEXT */
newp->lowmark = (void *)s;
newp->himark = (void *)(((long)s) + size - LWP_REDZONE);
}
sp = s + LWP_EXTRASTACK + redsize;
sp = (char *)0 + ((sp - (char *)0) & -sizeof(stkalign_t));
newp->lowmark = s;
newp->himark = s + size - LWP_REDZONE;
}
if (LWP_MAX_PRIO <= priority)
priority = LWP_MAX_PRIO - 1;
if (LwpMaxpri < (newp->pri = priority))
LwpMaxpri = priority;
newp->sbtm = (void *)s;
newp->sbtm = s;
newp->size = size;
newp->dead = 0;
if (flags & LWP_STACKCHECK)
@ -280,7 +249,10 @@ lwpCreate(int priority, void (*entry)(void *), int size, int flags, char *name,
lwpReady(newp);
lwpReady(LwpCurrent);
#ifdef UCONTEXT
lwpInitContext(newp, &sp); /* architecture-dependent: from arch.c */
usp.ss_sp = sp;
usp.ss_size = size;
usp.ss_flags = 0;
lwpInitContext(newp, &usp); /* architecture-dependent: from arch.c */
#else /* UCONTEXT */
lwpInitContext(newp, sp); /* architecture-dependent: from arch.c */
#endif /* UCONTEXT */