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} return bucket; } prev = bucket; } ++table->misses; return NULL; } int drmHashLookup(void *t, unsigned long key, void **value) { HashTablePtr table = (HashTablePtr)t; HashBucketPtr bucket; if (!table || table->magic != HASH_MAGIC) return -1; /* Bad magic */ bucket = HashFind(table, key, NULL); if (!bucket) return 1; /* Not found */ *value = bucket->value; return 0; /* Found */ } int drmHashInsert(void *t, unsigned long key, void *value) { HashTablePtr table = (HashTablePtr)t; HashBucketPtr bucket; unsigned long hash; if (table->magic != HASH_MAGIC) return -1; /* Bad magic */ if (HashFind(table, key, &hash)) return 1; /* Already in table */ bucket = HASH_ALLOC(sizeof(*bucket)); if (!bucket) return -1; /* Error */ bucket->key = key; bucket->value = value; bucket->next = table->buckets[hash]; table->buckets[hash] = bucket; #if HASH_DEBUG printf("Inserted %d at %d/%p\n", key, hash, bucket); #endif return 0; /* Added to table */ } int drmHashDelete(void *t, unsigned long key) { HashTablePtr table = (HashTablePtr)t; unsigned long hash; HashBucketPtr bucket; if (table->magic != HASH_MAGIC) return -1; /* Bad magic */ bucket = HashFind(table, key, &hash); if (!bucket) return 1; /* Not found */ table->buckets[hash] = bucket->next; HASH_FREE(bucket); return 0; } int drmHashNext(void *t, unsigned long *key, void **value) { HashTablePtr table = (HashTablePtr)t; while (table->p0 < HASH_SIZE) { if (table->p1) { *key = table->p1->key; *value = table->p1->value; table->p1 = table->p1->next; return 1; } table->p1 = table->buckets[table->p0]; ++table->p0; } return 0; } int drmHashFirst(void *t, unsigned long *key, void **value) { HashTablePtr table = (HashTablePtr)t; if (table->magic != HASH_MAGIC) return -1; /* Bad magic */ table->p0 = 0; table->p1 = table->buckets[0]; return drmHashNext(table, key, value); } #if HASH_MAIN #define DIST_LIMIT 10 static int dist[DIST_LIMIT]; static void clear_dist(void) { int i; for (i = 0; i < DIST_LIMIT; i++) dist[i] = 0; } static int count_entries(HashBucketPtr bucket) { int count = 0; for (; bucket; bucket = bucket->next) ++count; return count; } static void update_dist(int count) { if (count >= DIST_LIMIT) ++dist[DIST_LIMIT-1]; else ++dist[count]; } static void compute_dist(HashTablePtr table) { int i; HashBucketPtr bucket; printf("Entries = %ld, hits = %ld, partials = %ld, misses = %ld\n", table->entries, table->hits, table->partials, table->misses); clear_dist(); for (i = 0; i < HASH_SIZE; i++) { bucket = table->buckets[i]; update_dist(count_entries(bucket)); } for (i = 0; i < DIST_LIMIT; i++) { if (i != DIST_LIMIT-1) printf("%5d %10d\n", i, dist[i]); else printf("other %10d\n", dist[i]); } } static void check_table(HashTablePtr table, unsigned long key, unsigned long value) { unsigned long retval = 0; int retcode = drmHashLookup(table, key, &retval); switch (retcode) { case -1: printf("Bad magic = 0x%08lx:" " key = %lu, expected = %lu, returned = %lu\n", table->magic, key, value, retval); break; case 1: printf("Not found: key = %lu, expected = %lu returned = %lu\n", key, value, retval); break; case 0: if (value != retval) printf("Bad value: key = %lu, expected = %lu, returned = %lu\n", key, value, retval); break; default: printf("Bad retcode = %d: key = %lu, expected = %lu, returned = %lu\n", retcode, key, value, retval); break; } } int main(void) { HashTablePtr table; int i; printf("\n***** 256 consecutive integers ****\n"); table = drmHashCreate(); for (i = 0; i < 256; i++) drmHashInsert(table, i, i); for (i = 0; i < 256; i++) check_table(table, i, i); for (i = 256; i >= 0; i--) check_table(table, i, i); compute_dist(table); drmHashDestroy(table); printf("\n***** 1024 consecutive integers ****\n"); table = drmHashCreate(); for (i = 0; i < 1024; i++) drmHashInsert(table, i, i); for (i = 0; i < 1024; i++) check_table(table, i, i); for (i = 1024; i >= 0; i--) check_table(table, i, i); compute_dist(table); drmHashDestroy(table); printf("\n***** 1024 consecutive page addresses (4k pages) ****\n"); table = drmHashCreate(); for (i = 0; i < 1024; i++) drmHashInsert(table, i*4096, i); for (i = 0; i < 1024; i++) check_table(table, i*4096, i); for (i = 1024; i >= 0; i--) check_table(table, i*4096, i); compute_dist(table); drmHashDestroy(table); printf("\n***** 1024 random integers ****\n"); table = drmHashCreate(); srandom(0xbeefbeef); for (i = 0; i < 1024; i++) drmHashInsert(table, random(), i); srandom(0xbeefbeef); for (i = 0; i < 1024; i++) check_table(table, random(), i); srandom(0xbeefbeef); for (i = 0; i < 1024; i++) check_table(table, random(), i); compute_dist(table); drmHashDestroy(table); printf("\n***** 5000 random integers ****\n"); table = drmHashCreate(); srandom(0xbeefbeef); for (i = 0; i < 5000; i++) drmHashInsert(table, random(), i); srandom(0xbeefbeef); for (i = 0; i < 5000; i++) check_table(table, random(), i); srandom(0xbeefbeef); for (i = 0; i < 5000; i++) check_table(table, random(), i); compute_dist(table); drmHashDestroy(table); return 0; } #endif |
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index : renesas/drm.git | |
| libdrm, cloned from git://anongit.freedesktop.org/mesa/drm | Laurent Pinchart |
| summaryrefslogtreecommitdiff |
blob: 1300c83ae1722cd8fac4492a38ab15841f92d41a (plain)