Image*
attachimage(int type, Chan *c, int color, uintptr base, usize len)
{
Image *i, **l;
/* reclaim any free channels from reclaimed segments */
if(imagealloc.nfreechan)
imagechanreclaim();
lock(&imagealloc);
/*
* Search the image cache for remains of the text from a previous
* or currently running incarnation
*/
for(i = ihash(c->qid.path); i; i = i->hash) {
if(c->qid.path == i->qid.path) {
lock(i);
if(eqqid(c->qid, i->qid) &&
eqqid(c->mqid, i->mqid) &&
c->mchan == i->mchan &&
c->dev->dc == i->dc) {
//subtype
goto found;
}
unlock(i);
}
}
/*
* imagereclaim dumps pages from the free list which are cached by image
* structures. This should free some image structures.
*/
while(!(i = lruimage())) {
unlock(&imagealloc);
imagereclaim();
sched();
lock(&imagealloc);
}
lock(i);
incref(c);
i->c = c;
i->dc = c->dev->dc;
//subtype
i->qid = c->qid;
i->mqid = c->mqid;
i->mchan = c->mchan;
i->color = color;
l = &ihash(c->qid.path);
i->hash = *l;
*l = i;
found:
imageused(i);
unlock(&imagealloc);
if(i->s == 0) {
/* Disaster after commit in exec */
if(waserror()) {
unlock(i);
pexit(Enovmem, 1);
}
i->s = newseg(type, base, len);
i->s->image = i;
i->s->color = color;
i->ref++;
poperror();
}
else
incref(i->s);
return i;
}
Image*
attachimage(int type, Chan *c, ulong base, ulong len)
{
Image *i, **l;
lock(&imagealloc);
/*
* Search the image cache for remains of the text from a previous
* or currently running incarnation
*/
for(i = ihash(c->qid.path); i; i = i->hash) {
if(c->qid.path == i->qid.path) {
lock(i);
if(eqqid(c->qid, i->qid) &&
eqqid(c->mqid, i->mqid) &&
c->mchan == i->mchan &&
c->type == i->type) {
goto found;
}
unlock(i);
}
}
/*
* imagereclaim dumps pages from the free list which are cached by image
* structures. This should free some image structures.
*/
while(!(i = imagealloc.free)) {
unlock(&imagealloc);
imagereclaim();
if(!imagealloc.free){
freebroken(); /* can use the memory */
resrcwait("no image after reclaim");
}
lock(&imagealloc);
}
imagealloc.free = i->next;
lock(i);
incref(c);
c->flag &= ~CCACHE;
i->c = c;
i->type = c->type;
i->qid = c->qid;
i->mqid = c->mqid;
i->mchan = c->mchan;
l = &ihash(c->qid.path);
i->hash = *l;
*l = i;
found:
unlock(&imagealloc);
if(i->s == 0) {
i->ref++;
if(waserror()) {
unlock(i);
putimage(i);
nexterror();
}
i->s = newseg(type, base, len);
i->s->image = i;
poperror();
}
else
incref(i->s);
return i;
}
Image*
attachimage(int type, Chan *c, ulong base, ulong len)
{
Image *i, **l;
/* reclaim any free channels from reclaimed segments */
if(imagealloc.nfreechan)
imagechanreclaim();
lock(&imagealloc.lk);
/*
* Search the image cache for remains of the text from a previous
* or currently running incarnation
*/
for(i = ihash(c->qid.path); i; i = i->hash) {
if(c->qid.path == i->qid.path) {
lock(&i->ref.lk);
if(eqqid(c->qid, i->qid) &&
eqqid(c->mqid, i->mqid) &&
c->mchan == i->mchan &&
c->type == i->type) {
goto found;
}
unlock(&i->ref.lk);
}
}
/*
* imagereclaim dumps pages from the free list which are cached by image
* structures. This should free some image structures.
*/
while(!(i = imagealloc.free)) {
unlock(&imagealloc.lk);
imagereclaim();
sched();
lock(&imagealloc.lk);
}
imagealloc.free = i->next;
lock(&i->ref.lk);
incref(&c->ref);
i->c = c;
i->type = c->type;
i->qid = c->qid;
i->mqid = c->mqid;
i->mchan = c->mchan;
l = &ihash(c->qid.path);
i->hash = *l;
*l = i;
found:
unlock(&imagealloc.lk);
if(i->s == 0) {
/* Disaster after commit in exec */
if(waserror()) {
unlock(&i->ref.lk);
pexit(Enovmem, 1);
}
i->s = newseg(type, base, len);
i->s->image = i;
i->ref.ref++;
poperror();
}
else
incref(&i->s->ref);
return i;
}