int
cal_alloc_chunk(_sbinfo sbinfo, vnode * v, unsigned long long blocks)
{
int nr, i = 0, sum = 0;
nr = find_first_zero(sbinfo->bitmap, MaxBlocks * 8);
while (sum < blocks && i < MaxchunkCount) {
v->block[i][0] = nr;
sum++;
nr++;
while (sum < blocks && !bit(sbinfo->bitmap, nr)) {
nr++;
sum++;
}
v->block[i][1] = nr;
if (i == 0 && sum < 2 && sum < blocks)
sum = 0;
else
i++;
while (bit(sbinfo->bitmap, nr))
nr++;
}
if (i == MaxchunkCount || sum < blocks) {
ErrorFlag = TOO_FLAGS;
//_Debug("too frags\n",__LINE__,__FILE__);
for (i = 0; i < MaxchunkCount; i++)
v->block[i][0] = CHUNKNULL;
return -1;
}
while (i < MaxchunkCount) {
v->block[i][0] = CHUNKNULL;
i++;
}
return 0;
}
/*
* get the specified goal block
* if alread alloced find it by looking forward
*/
int ext2_grab_block(char *bitmap, unsigned int goal)
{
if ( !ext2_test_bit(bitmap, goal) )
goto got_block;
/* else looking forward */
goal = find_first_zero (bitmap, goal + 1, EXT2_BLOCKS_PER_GROUP);
got_block:
return goal;
}
DEF_TEST(Paint_cmap, reporter) {
// need to implement charsToGlyphs on other backends (e.g. linux, win)
// before we can run this tests everywhere
return;
static const int NGLYPHS = 64;
SkUnichar src[NGLYPHS];
SkUnichar dst[NGLYPHS]; // used for utf8, utf16, utf32 storage
static const struct {
size_t (*fSeedTextProc)(const SkUnichar[], void* dst, int count);
SkPaint::TextEncoding fEncoding;
} gRec[] = {
{ uni_to_utf8, SkPaint::kUTF8_TextEncoding },
{ uni_to_utf16, SkPaint::kUTF16_TextEncoding },
{ uni_to_utf32, SkPaint::kUTF32_TextEncoding },
};
SkRandom rand;
SkPaint paint;
paint.setTypeface(SkTypeface::RefDefault())->unref();
SkTypeface* face = paint.getTypeface();
for (int i = 0; i < 1000; ++i) {
// generate some random text
for (int j = 0; j < NGLYPHS; ++j) {
src[j] = ' ' + j;
}
// inject some random chars, to sometimes abort early
src[rand.nextU() & 63] = rand.nextU() & 0xFFF;
for (size_t k = 0; k < SK_ARRAY_COUNT(gRec); ++k) {
paint.setTextEncoding(gRec[k].fEncoding);
size_t len = gRec[k].fSeedTextProc(src, dst, NGLYPHS);
uint16_t glyphs0[NGLYPHS], glyphs1[NGLYPHS];
bool contains = paint.containsText(dst, len);
int nglyphs = paint.textToGlyphs(dst, len, glyphs0);
int first = face->charsToGlyphs(dst, paint2encoding(paint), glyphs1, NGLYPHS);
int index = find_first_zero(glyphs1, NGLYPHS);
REPORTER_ASSERT(reporter, NGLYPHS == nglyphs);
REPORTER_ASSERT(reporter, index == first);
REPORTER_ASSERT(reporter, 0 == memcmp(glyphs0, glyphs1, NGLYPHS * sizeof(uint16_t)));
if (contains) {
REPORTER_ASSERT(reporter, NGLYPHS == first);
} else {
REPORTER_ASSERT(reporter, NGLYPHS > first);
}
}
}
}
_vnodeInfo
alloc_vi(_sbinfo sbinfo)
{
int nr;
while (spin_trywrlock(sbinfo->_bh->spin));
if ((nr = find_first_zero(sbinfo->_bh->map, MaxBufBitmapLen * 8)) == MaxBufBitmapLen * 8) {
ErrorFlag = MAX_RDWR_COUNT;
spin_rwunlock(sbinfo->_bh->spin);
return NULL;
}
spin_rwunlock(sbinfo->_bh->spin);
return (_vnodeInfo) (sbinfo->_bf + sizeof(struct vnodeInfo) * nr);
}
struct m_inode * new_inode(int dev)
{
struct m_inode * inode;
struct super_block * sb;
struct buffer_head * bh;
int i,j;
inode = alloc_inode();
if (!inode)
return NULL;
if (!(sb = get_super(dev)))
panic("new_inode with unknown device");
j = 8192;
for (i=0 ; i<8 ; i++) {
if ((bh = sb->s_imap[i])) {
if ((j=find_first_zero(bh->b_data))<8192)
break;
}
}
if (!bh || j >= 8192 || j+i*8192 > sb->s_ninodes) {
panic("not implemented!\n");
//iput(inode);
return NULL;
}
if (test_and_set_bit(j,bh->b_data))
panic("new_inode: bit already set");
bh->b_dirt = 1;
inode->i_count=1;
inode->i_nlinks=1;
inode->i_dev=dev;
// inode->i_uid=current->euid;
// inode->i_gid=current->egid;
inode->i_dirt=1;
inode->i_num = j + i*8192;
// inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
return inode;
}
int new_block(int dev)
{
struct buffer_head * bh;
struct super_block * sb;
int i,j;
if (!(sb = get_super(dev)))
panic("trying to get new block from nonexistant device");
j = 8192;
for (i = 0 ; i < 8 ; i++) {
if ((bh = sb->s_zmap[i])) {
if ((j = find_first_zero(bh->b_data)) < 8192)
break;
}
}
if (i>=8 || !bh || j>=8192)
return 0;
if (test_and_set_bit(j,bh->b_data))
panic("new_block: bit already set");
bh->b_dirt = 1;
j += i*8192 + sb->s_firstdatazone-1;
if (j >= sb->s_nzones)
return 0;
if (!(bh= buffer_get(dev,j)))
panic("new_block: cannot get block");
if (bh->b_count != 1)
panic("new block: count is != 1");
//clear_block(bh->b_data);
bh->b_uptodate = 1;
bh->b_dirt = 1;
//brelse(bh);
return j;
}
char *
extend_buf(vnode * v, _sbinfo sbinfo, char mode)
{
int nr;
uint8_t key = 0;
_vnodeInfo vi, p;
while (spin_trywrlock(sbinfo->_bh->spin));
if ((nr = find_first_zero(sbinfo->_bh->map, MaxBufBitmapLen * 8)) == MaxBufBitmapLen * 8) {
ErrorFlag = MAX_RDWR_COUNT;
spin_rwunlock(sbinfo->_bh->spin);
return NULL;
}
setbit_(sbinfo->_bh->map, nr);
spin_rwunlock(sbinfo->_bh->spin);
// if(!v->_bf) spin_rwinit(v->spin);
while (spin_wrlock(v->spin));
vi = v->_bf;
if (vi == NULL || vi->key > key) { //分配key是有序的。
p = v->_bf;
v->_bf = (_vnodeInfo) (sbinfo->_bf + sizeof(struct vnodeInfo) * nr);
v->_bf->next = p;
vi = v->_bf;
p = NULL;
} else {
while (vi) {
key++;
if (!vi->next || vi->next->key > key) {
p = vi->next;
vi->next = (_vnodeInfo) (sbinfo->_bf + sizeof(struct vnodeInfo) * nr);
vi->next->next = p;
p = vi;
vi = vi->next;
break;
}
vi = vi->next;
}
}
pthread_mutex_lock(&sbinfo->mutex);
vi->fd = open(sbinfo->volName, O_RDWR);
pthread_mutex_unlock(&sbinfo->mutex);
pthread_mutex_init(&vi->mutex, NULL);
if (vi->fd <= 2) {
pthread_mutex_lock(&sbinfo->mutex);
vi->fd = open(sbinfo->volName, O_RDWR);
pthread_mutex_unlock(&sbinfo->mutex);
}
spin_rwunlock(v->spin);
// }
/* else {
ErrorFlag=LOCK_ERR;
return NULL;
} */
vi->key = key;
vi->ID = ((char *)v - (char *)sbinfo->vnodeTable) / sizeof(vnode);
if (mode == ReadRECORD) {
vi->status = ReadRECORD;
vi->nextTimeAddr = 0;
vi->count = TimeNULL;
//vi->fd=open(sbinfo->volName,O_RDWR);
// if(vi->fd<=2){
// vi->fd=open(sbinfo->volName,O_RDWR);
// }
} else {
vi->count = 0;
vi->status = WriteRECORD;
vi->is_starttime = NOTSET;
// vi->fd=open(sbinfo->volName,O_RDWR);
// if(vi->fd<=2){
//close(vi->fd);
// vi->fd=open(sbinfo->volName,O_RDWR);
// }
}
//////////////////////////////////////////////
if (vi->fd < 0) {
while (spin_trywrlock(sbinfo->_bh->spin));
clrbit_(sbinfo->_bh->map, nr);
spin_rwunlock(sbinfo->_bh->spin);
while (spin_trywrlock(v->spin));
if (p)
p->next = p->next->next;
else
v->_bf = vi->next;
spin_rwunlock(v->spin);
pthread_mutex_destroy(&vi->mutex);
ErrorFlag = ALLOC_FD_ERR;
return NULL;
}
// v->status++;
return (char *)vi;
}
