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reduced the code size by 200 bytes.

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fixed an EOF hint bug that occured when files where extended.
This commit is contained in:
nvt-se 2008-12-09 16:01:18 +00:00
parent a50d5b701e
commit 532ebc1e9a
1 changed files with 59 additions and 50 deletions
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109
core/cfs/cfs-coffee.c
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@ -68,6 +68,8 @@
#define COFFEE_FD_APPEND 0x4
#define COFFEE_FD_MODIFIED 0x8
#define INVALID_PAGE ((coffee_page_t)-1)
#define FD_VALID(fd) \
((fd) >= 0 && (fd) < COFFEE_FD_SET_SIZE && \
coffee_fd_set[(fd)].flags != COFFEE_FD_FREE)
@ -128,10 +130,6 @@ struct log_param {
uint16_t size;
};
#define ABS_OFFSET(file_page, file_offset) \
((file_page) * COFFEE_PAGE_SIZE + \
sizeof(struct file_header) + (file_offset))
static struct dir_cache dir_cache[COFFEE_DIR_CACHE_ENTRIES];
static struct file_desc coffee_fd_set[COFFEE_FD_SET_SIZE];
@ -148,6 +146,12 @@ read_header(struct file_header *hdr, coffee_page_t page)
COFFEE_READ(hdr, sizeof(*hdr), page * COFFEE_PAGE_SIZE);
}
/*---------------------------------------------------------------------------*/
static coffee_offset_t
absolute_offset(coffee_page_t page, coffee_offset_t offset)
{
return page * COFFEE_PAGE_SIZE + sizeof(struct file_header) + offset;
}
/*---------------------------------------------------------------------------*/
static void
get_sector_status(uint16_t sector, coffee_page_t *active,
coffee_page_t *free, coffee_page_t *obsolete) {
@ -193,7 +197,7 @@ get_sector_status(uint16_t sector, coffee_page_t *active,
(unsigned)skip_pages, (int)sector);
}
offset = sector_start + skip_pages * COFFEE_PAGE_SIZE;
offset = sector_start + (skip_pages * COFFEE_PAGE_SIZE);
end = (sector + 1) * COFFEE_SECTOR_SIZE;
jump = 0;
@ -340,10 +344,10 @@ find_offset_in_file(int first_page)
{
struct file_header hdr;
unsigned char buf[COFFEE_PAGE_SIZE];
int page;
coffee_page_t page;
int i;
int search_limit;
coffee_offset_t range_start, range_end, part_size;
coffee_page_t range_start, range_end, part_size;
read_header(&hdr, first_page);
search_limit = 0;
@ -375,11 +379,10 @@ find_offset_in_file(int first_page)
COFFEE_READ(buf, sizeof(buf), page * COFFEE_PAGE_SIZE);
for(i = COFFEE_PAGE_SIZE - 1; i >= 0; i--) {
if(buf[i] != 0) {
if(page == first_page) {
return i < sizeof(hdr) ? 0 : 1 + i - sizeof(hdr);
} else {
return 1 + i + (page - first_page) * COFFEE_PAGE_SIZE - sizeof(hdr);
if(page == first_page && i < sizeof(hdr)) {
return 0;
}
return 1 + i + ((page - first_page) * COFFEE_PAGE_SIZE) - sizeof(hdr);
}
}
}
@ -388,10 +391,10 @@ find_offset_in_file(int first_page)
return 0;
}
/*---------------------------------------------------------------------------*/
static int
static coffee_page_t
find_contiguous_pages(unsigned wanted)
{
int page, start;
coffee_page_t page, start;
struct file_header hdr;
start = -1;
@ -485,12 +488,18 @@ remove_by_page(coffee_page_t page, int remove_log, int close_fds)
return 0;
}
/*---------------------------------------------------------------------------*/
static coffee_page_t
page_count(coffee_offset_t size)
{
return (size + sizeof(struct file_header) + COFFEE_PAGE_SIZE - 1) /
COFFEE_PAGE_SIZE;
}
/*---------------------------------------------------------------------------*/
static int
reserve(const char *name, uint32_t size, int allow_duplicates)
reserve(const char *name, coffee_page_t pages, int allow_duplicates)
{
struct file_header hdr;
unsigned need_pages;
int page;
coffee_page_t page;
watchdog_stop();
@ -499,13 +508,11 @@ reserve(const char *name, uint32_t size, int allow_duplicates)
return -1;
}
need_pages = (size + sizeof(hdr) + COFFEE_PAGE_SIZE - 1) / COFFEE_PAGE_SIZE;
page = find_contiguous_pages(need_pages);
if(page < 0) {
page = find_contiguous_pages(pages);
if(page == INVALID_PAGE) {
cfs_garbage_collect();
page = find_contiguous_pages(need_pages);
if(page < 0) {
page = find_contiguous_pages(pages);
if(page == INVALID_PAGE) {
watchdog_start();
return -1;
}
@ -513,7 +520,7 @@ reserve(const char *name, uint32_t size, int allow_duplicates)
memcpy(hdr.name, name, sizeof(hdr.name));
hdr.name[sizeof(hdr.name) - 1] = '\0';
hdr.max_pages = need_pages;
hdr.max_pages = pages;
hdr.flags = COFFEE_FLAG_ALLOCATED | COFFEE_FLAG_VALID;
hdr.log_page = 0;
hdr.eof_hint = 0;
@ -564,7 +571,7 @@ get_record_index(coffee_page_t log_page, uint16_t search_records,
int16_t match_index, i;
uint16_t record_count;
base = ABS_OFFSET(log_page, sizeof(uint16_t) * search_records);
base = absolute_offset(log_page, sizeof(uint16_t) * search_records);
record_count = search_records > COFFEE_LOG_TABLE_LIMIT ?
COFFEE_LOG_TABLE_LIMIT : search_records;
processed = 0;
@ -656,8 +663,8 @@ create_log(coffee_page_t file_page, struct file_header *hdr)
size += log_records * log_record_size; /* Log data size. */
log_page = reserve(create_log_name(log_name, sizeof(log_name), hdr->name),
size, 0);
if(log_page < 0) {
page_count(size), 0);
if(log_page == INVALID_PAGE) {
return -1;
}
@ -698,10 +705,8 @@ merge_log(coffee_page_t file_page, int extend)
* already been calculated with in the previous reservation.
*/
max_pages = hdr.max_pages * (1 << extend);
new_file_page = reserve(hdr.name,
max_pages * COFFEE_PAGE_SIZE - sizeof(hdr),
1);
if(new_file_page < 0) {
new_file_page = reserve(hdr.name, max_pages, 1);
if(new_file_page == INVALID_PAGE) {
cfs_close(fd);
return -1;
}
@ -717,7 +722,7 @@ merge_log(coffee_page_t file_page, int extend)
return -1;
} else if(n > 0) {
COFFEE_WRITE(buf, n,
ABS_OFFSET(new_file_page, offset));
absolute_offset(new_file_page, offset));
offset += n;
}
} while(n != 0);
@ -732,8 +737,11 @@ merge_log(coffee_page_t file_page, int extend)
read_header(&hdr2, new_file_page);
hdr2.log_record_size = hdr.log_record_size;
hdr2.log_records = hdr.log_records;
hdr2.eof_hint = hdr.eof_hint;
hdr2.eof_hint = extend ? 0 : hdr.eof_hint;
write_header(&hdr2, new_file_page);
if(extend) {
update_eof_hint(new_file_page, offset);
}
/* Point the file descriptors to the new file page. */
for(n = 0; n < COFFEE_FD_SET_SIZE; n++) {
@ -771,7 +779,7 @@ find_next_record(struct file_desc *fdp, coffee_page_t log_page,
preferred_batch_size : log_records - processed;
COFFEE_READ(&indices, batch_size * sizeof(indices[0]),
ABS_OFFSET(log_page, processed * sizeof(indices[0])));
absolute_offset(log_page, processed * sizeof(indices[0])));
for(i = 0; i < batch_size && indices[i] != 0; i++);
log_record = i;
@ -818,7 +826,7 @@ write_log_page(struct file_desc *fdp, struct log_param *lp)
} else {
/* Create a log structure. */
log_page = create_log(fdp->file_page, &hdr);
if(log_page < 0) {
if(log_page == INVALID_PAGE) {
return -1;
}
PRINTF("Coffee: Created a log structure for file %s at page %u\n",
@ -837,7 +845,7 @@ write_log_page(struct file_desc *fdp, struct log_param *lp)
if((lp->offset > 0 || lp->size != log_record_size) &&
read_log_page(&hdr, fdp->next_log_record - 1, &lp_out) < 0) {
COFFEE_READ(copy_buf, sizeof(copy_buf),
ABS_OFFSET(fdp->file_page, region * log_record_size));
absolute_offset(fdp->file_page, region * log_record_size));
}
memcpy((char *) &copy_buf + lp->offset, lp->buf, lp->size);
@ -850,7 +858,7 @@ write_log_page(struct file_desc *fdp, struct log_param *lp)
COFFEE_WRITE(copy_buf, sizeof(copy_buf), base);
++region;
COFFEE_WRITE(&region, sizeof(region),
ABS_OFFSET(log_page, log_record * sizeof(region)));
absolute_offset(log_page, log_record * sizeof(region)));
fdp->next_log_record = log_record + 1;
}
@ -886,15 +894,14 @@ cfs_open(const char *name, int flags)
fdp = &coffee_fd_set[fd];
page = find_file(name);
if(page < 0) {
if(page == INVALID_PAGE) {
if((flags & (CFS_READ | CFS_WRITE)) == CFS_READ) {
return -1;
}
if((page = reserve(name, COFFEE_DYN_SIZE, 1)) < 0) {
if((page = reserve(name, page_count(COFFEE_DYN_SIZE), 1)) == INVALID_PAGE) {
return -1;
}
fdp->max_pages = (COFFEE_DYN_SIZE + sizeof(hdr) +
COFFEE_PAGE_SIZE - 1) / COFFEE_PAGE_SIZE;
fdp->max_pages = page_count(COFFEE_DYN_SIZE);
} else {
read_header(&hdr, page);
if(COFFEE_FILE_MODIFIED(hdr)) {
@ -925,11 +932,13 @@ unsigned
cfs_seek(int fd, unsigned offset)
{
struct file_header hdr;
struct file_desc *fdp;
if(!FD_VALID(fd)) {
return -1;
}
read_header(&hdr, coffee_fd_set[fd].file_page);
fdp = &coffee_fd_set[fd];
read_header(&hdr, fdp->file_page);
/* Check if the offset is within the file boundary. */
if(sizeof(hdr) + offset >= hdr.max_pages * COFFEE_PAGE_SIZE ||
@ -937,11 +946,11 @@ cfs_seek(int fd, unsigned offset)
return -1;
}
if(coffee_fd_set[fd].end < offset) {
coffee_fd_set[fd].end = offset;
if(fdp->end < offset) {
fdp->end = offset;
}
return coffee_fd_set[fd].offset = offset;
return fdp->offset = offset;
}
/*---------------------------------------------------------------------------*/
int
@ -957,7 +966,7 @@ cfs_remove(const char *name)
*/
page = find_file(name);
if(page < 0) {
if(page == INVALID_PAGE) {
return -1;
}
@ -1011,7 +1020,7 @@ cfs_read(int fd, void *buf, unsigned size)
if(r < 0) {
r = remains > read_chunk ? read_chunk : remains;
COFFEE_READ((char *) buf + offset, r,
ABS_OFFSET(fdp->file_page, base + offset));
absolute_offset(fdp->file_page, base + offset));
}
remains -= r;
offset += r;
@ -1035,7 +1044,7 @@ cfs_write(int fd, const void *buf, unsigned size)
fdp = &coffee_fd_set[fd];
/* Attempt to extend the file if we try to write past the end. */
while(size + fdp->offset + sizeof(struct file_header) >
fdp->max_pages * COFFEE_PAGE_SIZE) {
(fdp->max_pages * COFFEE_PAGE_SIZE)) {
update_eof_hint(fdp->file_page, fdp->end);
if(merge_log(fdp->file_page, 1) < 0) {
return -1;
@ -1062,7 +1071,7 @@ cfs_write(int fd, const void *buf, unsigned size)
}
} else {
COFFEE_WRITE(buf, size,
ABS_OFFSET(fdp->file_page, fdp->offset));
absolute_offset(fdp->file_page, fdp->offset));
fdp->offset += size;
}
@ -1131,7 +1140,7 @@ cfs_closedir(struct cfs_dir *dir)
int
cfs_coffee_reserve(const char *name, uint32_t size)
{
return reserve(name, size, 0);
return reserve(name, page_count(size), 0);
}
/*---------------------------------------------------------------------------*/
int
@ -1147,7 +1156,7 @@ cfs_coffee_configure_log(const char *file, unsigned log_size,
}
page = find_file(file);
if(page < 0) {
if(page == INVALID_PAGE) {
return -1;
}