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Reduce memory cost in entry_table

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Original code double entry table space if there is no space. It may
waste 50% memory of the entry table. Now we use a link list to store
entry items.
This commit is contained in:
Homer Hsing 2012-09-14 15:27:19 +08:00 committed by Damien Lespiau
parent f02a1ed427
commit c19f8338d7
1 changed files with 28 additions and 40 deletions
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68
assembler/src/main.c
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@ -116,47 +116,27 @@ static void free_register_table(void)
}
}
char **entry_point_table = NULL;
int entry_point_table_length = 0;
struct entry_point_item {
char *str;
struct entry_point_item *next;
} *entry_point_table;
#define DEFAULTBUFSIZE 800
static int read_entry_file(char *fn)
{
FILE *entry_table_file;
char buf[DEFAULTBUFSIZE];
char *ptr;
int curr_table_length = 80;
if (!fn) {
char buf[2048];
struct entry_point_item **p = &entry_point_table;
if (!fn)
return 0;
}
if ((entry_point_table =
malloc(curr_table_length*sizeof(char*))) == NULL) {
return 1;
}
entry_table_file = fopen(fn, "r");
if (!entry_table_file) {
return 1;
}
while (1) {
int size = DEFAULTBUFSIZE;
if((ptr = fgets(buf, size, entry_table_file))==NULL)
{
break;
}
buf[strlen(buf)-1] = '\0';
if(entry_point_table_length == curr_table_length)
{
if ((entry_point_table = realloc(entry_point_table,
curr_table_length*2*sizeof(char*))) == NULL) {
return 1;
}
curr_table_length *= 2;
}
entry_point_table[entry_point_table_length] = strdup(buf);
entry_point_table_length ++;
if ((entry_table_file = fopen(fn, "r")) == NULL)
return -1;
while (fgets(buf, sizeof(buf)-1, entry_table_file) != NULL) {
// drop the final char '\n'
if(buf[strlen(buf)-1] == '\n')
buf[strlen(buf)-1] = 0;
*p = calloc(1, sizeof(struct entry_point_item));
(*p)->str = strdup(buf);
p = &((*p)->next);
}
fclose(entry_table_file);
return 0;
@ -164,15 +144,22 @@ static int read_entry_file(char *fn)
static int is_entry_point(char *s)
{
int i;
for (i = 0; i < entry_point_table_length; i++) {
if (strcmp(entry_point_table[i], s) == 0) {
struct entry_point_item *p;
for (p = entry_point_table; p; p = p->next) {
if (strcmp(p->str, s) == 0)
return 1;
}
}
return 0;
}
static void free_entry_point_table(struct entry_point_item *p) {
if (p) {
free_entry_point_table(p->next);
free(p->str);
free(p);
}
}
static void
print_instruction(FILE *output, struct brw_program_instruction *entry)
{
@ -379,6 +366,7 @@ int main(int argc, char **argv)
if (binary_like_output)
fprintf(output, "};");
free_entry_point_table(entry_point_table);
free_register_table();
fflush (output);
if (ferror (output)) {