util/disk_cache: use unambiguous naming

Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

3 files changed, 114 insertions, 112 deletions

diff --git a/src/compiler/glsl/tests/cache_test.c b/src/compiler/glsl/tests/cache_test.c
index 94a3c1dfb9..ca22605f3e 100644
--- a/src/compiler/glsl/tests/cache_test.c
+++ b/src/compiler/glsl/tests/cache_test.c
@@ -115,65 +115,65 @@ rmrf_local(const char *path)
 #define CACHE_TEST_TMP "./cache-test-tmp"
 
 static void
-test_cache_create(void)
+test_disk_cache_create(void)
 {
-   struct program_cache *cache;
+   struct disk_cache *cache;
    int err;
 
    /* Before doing anything else, ensure that with
-    * MESA_GLSL_CACHE_DISABLE set, that cache_create returns NULL.
+    * MESA_GLSL_CACHE_DISABLE set, that disk_cache_create returns NULL.
     */
    setenv("MESA_GLSL_CACHE_DISABLE", "1", 1);
-   cache = cache_create();
-   expect_null(cache, "cache_create with MESA_GLSL_CACHE_DISABLE set");
+   cache = disk_cache_create();
+   expect_null(cache, "disk_cache_create with MESA_GLSL_CACHE_DISABLE set");
 
    unsetenv("MESA_GLSL_CACHE_DISABLE");
 
-   /* For the first real cache_create() clear these environment
+   /* For the first real disk_cache_create() clear these environment
     * variables to test creation of cache in home directory.
     */
    unsetenv("MESA_GLSL_CACHE_DIR");
    unsetenv("XDG_CACHE_HOME");
 
-   cache = cache_create();
-   expect_non_null(cache, "cache_create with no environment variables");
+   cache = disk_cache_create();
+   expect_non_null(cache, "disk_cache_create with no environment variables");
 
-   cache_destroy(cache);
+   disk_cache_destroy(cache);
 
    /* Test with XDG_CACHE_HOME set */
    setenv("XDG_CACHE_HOME", CACHE_TEST_TMP "/xdg-cache-home", 1);
-   cache = cache_create();
-   expect_null(cache, "cache_create with XDG_CACHE_HOME set with"
+   cache = disk_cache_create();
+   expect_null(cache, "disk_cache_create with XDG_CACHE_HOME set with"
                "a non-existing parent directory");
 
    mkdir(CACHE_TEST_TMP, 0755);
-   cache = cache_create();
-   expect_non_null(cache, "cache_create with XDG_CACHE_HOME set");
+   cache = disk_cache_create();
+   expect_non_null(cache, "disk_cache_create with XDG_CACHE_HOME set");
 
-   cache_destroy(cache);
+   disk_cache_destroy(cache);
 
    /* Test with MESA_GLSL_CACHE_DIR set */
    err = rmrf_local(CACHE_TEST_TMP);
    expect_equal(err, 0, "Removing " CACHE_TEST_TMP);
 
    setenv("MESA_GLSL_CACHE_DIR", CACHE_TEST_TMP "/mesa-glsl-cache-dir", 1);
-   cache = cache_create();
-   expect_null(cache, "cache_create with MESA_GLSL_CACHE_DIR set with"
+   cache = disk_cache_create();
+   expect_null(cache, "disk_cache_create with MESA_GLSL_CACHE_DIR set with"
                "a non-existing parent directory");
 
    mkdir(CACHE_TEST_TMP, 0755);
-   cache = cache_create();
-   expect_non_null(cache, "cache_create with MESA_GLSL_CACHE_DIR set");
+   cache = disk_cache_create();
+   expect_non_null(cache, "disk_cache_create with MESA_GLSL_CACHE_DIR set");
 
-   cache_destroy(cache);
+   disk_cache_destroy(cache);
 }
 
 static bool
-does_cache_contain(struct program_cache *cache, cache_key key)
+does_cache_contain(struct disk_cache *cache, cache_key key)
 {
    void *result;
 
-   result = cache_get(cache, key, NULL);
+   result = disk_cache_get(cache, key, NULL);
 
    if (result) {
       free(result);
@@ -186,7 +186,7 @@ does_cache_contain(struct program_cache *cache, cache_key key)
 static void
 test_put_and_get(void)
 {
-   struct program_cache *cache;
+   struct disk_cache *cache;
    /* If the text of this blob is changed, then blob_key_byte_zero
     * also needs to be updated.
     */
@@ -201,39 +201,39 @@ test_put_and_get(void)
    uint8_t one_KB_key[20], one_MB_key[20];
    int count;
 
-   cache = cache_create();
+   cache = disk_cache_create();
 
    _mesa_sha1_compute(blob, sizeof(blob), blob_key);
 
-   /* Ensure that cache_get returns nothing before anything is added. */
-   result = cache_get(cache, blob_key, &size);
-   expect_null(result, "cache_get with non-existent item (pointer)");
-   expect_equal(size, 0, "cache_get with non-existent item (size)");
+   /* Ensure that disk_cache_get returns nothing before anything is added. */
+   result = disk_cache_get(cache, blob_key, &size);
+   expect_null(result, "disk_cache_get with non-existent item (pointer)");
+   expect_equal(size, 0, "disk_cache_get with non-existent item (size)");
 
    /* Simple test of put and get. */
-   cache_put(cache, blob_key, blob, sizeof(blob));
+   disk_cache_put(cache, blob_key, blob, sizeof(blob));
 
-   result = cache_get(cache, blob_key, &size);
-   expect_equal_str(blob, result, "cache_get of existing item (pointer)");
-   expect_equal(size, sizeof(blob), "cache_get of existing item (size)");
+   result = disk_cache_get(cache, blob_key, &size);
+   expect_equal_str(blob, result, "disk_cache_get of existing item (pointer)");
+   expect_equal(size, sizeof(blob), "disk_cache_get of existing item (size)");
 
    free(result);
 
    /* Test put and get of a second item. */
    _mesa_sha1_compute(string, sizeof(string), string_key);
-   cache_put(cache, string_key, string, sizeof(string));
+   disk_cache_put(cache, string_key, string, sizeof(string));
 
-   result = cache_get(cache, string_key, &size);
-   expect_equal_str(result, string, "2nd cache_get of existing item (pointer)");
-   expect_equal(size, sizeof(string), "2nd cache_get of existing item (size)");
+   result = disk_cache_get(cache, string_key, &size);
+   expect_equal_str(result, string, "2nd disk_cache_get of existing item (pointer)");
+   expect_equal(size, sizeof(string), "2nd disk_cache_get of existing item (size)");
 
    free(result);
 
    /* Set the cache size to 1KB and add a 1KB item to force an eviction. */
-   cache_destroy(cache);
+   disk_cache_destroy(cache);
 
    setenv("MESA_GLSL_CACHE_MAX_SIZE", "1K", 1);
-   cache = cache_create();
+   cache = disk_cache_create();
 
    one_KB = calloc(1, 1024);
 
@@ -243,7 +243,7 @@ test_put_and_get(void)
     * (with only three files in the cache), the probability is good
     * that each of the three files will end up in their own
     * directory. Then, if the directory containing the .tmp file for
-    * the new item being added for cache_put() is the chosen victim
+    * the new item being added for disk_cache_put() is the chosen victim
     * directory for eviction, then no suitable file will be found and
     * nothing will be evicted.
     *
@@ -257,13 +257,13 @@ test_put_and_get(void)
    _mesa_sha1_compute(one_KB, 1024, one_KB_key);
    one_KB_key[0] = blob_key_byte_zero;
 
-   cache_put(cache, one_KB_key, one_KB, 1024);
+   disk_cache_put(cache, one_KB_key, one_KB, 1024);
 
    free(one_KB);
 
-   result = cache_get(cache, one_KB_key, &size);
-   expect_non_null(result, "3rd cache_get of existing item (pointer)");
-   expect_equal(size, 1024, "3rd cache_get of existing item (size)");
+   result = disk_cache_get(cache, one_KB_key, &size);
+   expect_non_null(result, "3rd disk_cache_get of existing item (pointer)");
+   expect_equal(size, 1024, "3rd disk_cache_get of existing item (size)");
 
    free(result);
 
@@ -277,18 +277,18 @@ test_put_and_get(void)
    if (does_cache_contain(cache, string_key))
        count++;
 
-   expect_equal(count, 1, "cache_put eviction with MAX_SIZE=1K");
+   expect_equal(count, 1, "disk_cache_put eviction with MAX_SIZE=1K");
 
    /* Now increase the size to 1M, add back both items, and ensure all
-    * three that have been added are available via cache_get.
+    * three that have been added are available via disk_cache_get.
     */
-   cache_destroy(cache);
+   disk_cache_destroy(cache);
 
    setenv("MESA_GLSL_CACHE_MAX_SIZE", "1M", 1);
-   cache = cache_create();
+   cache = disk_cache_create();
 
-   cache_put(cache, blob_key, blob, sizeof(blob));
-   cache_put(cache, string_key, string, sizeof(string));
+   disk_cache_put(cache, blob_key, blob, sizeof(blob));
+   disk_cache_put(cache, string_key, string, sizeof(string));
 
    count = 0;
    if (does_cache_contain(cache, blob_key))
@@ -308,7 +308,7 @@ test_put_and_get(void)
    _mesa_sha1_compute(one_MB, 1024 * 1024, one_MB_key);
    one_MB_key[0] = blob_key_byte_zero;;
 
-   cache_put(cache, one_MB_key, one_MB, 1024 * 1024);
+   disk_cache_put(cache, one_MB_key, one_MB, 1024 * 1024);
 
    free(one_MB);
 
@@ -324,13 +324,13 @@ test_put_and_get(void)
 
    expect_equal(count, 2, "eviction after overflow with MAX_SIZE=1M");
 
-   cache_destroy(cache);
+   disk_cache_destroy(cache);
 }
 
 static void
 test_put_key_and_get_key(void)
 {
-   struct program_cache *cache;
+   struct disk_cache *cache;
    bool result;
 
    uint8_t key_a[20] = {  0,  1,  2,  3,  4,  5,  6,  7,  8,  9,
@@ -341,42 +341,42 @@ test_put_key_and_get_key(void)
                         { 0,  1, 42, 43, 44, 45, 46, 47, 48, 49,
                          50, 55, 52, 53, 54, 55, 56, 57, 58, 59};
 
-   cache = cache_create();
+   cache = disk_cache_create();
 
-   /* First test that cache_has_key returns false before cache_put_key */
-   result = cache_has_key(cache, key_a);
-   expect_equal(result, 0, "cache_has_key before key added");
+   /* First test that disk_cache_has_key returns false before disk_cache_put_key */
+   result = disk_cache_has_key(cache, key_a);
+   expect_equal(result, 0, "disk_cache_has_key before key added");
 
-   /* Then a couple of tests of cache_put_key followed by cache_has_key */
-   cache_put_key(cache, key_a);
-   result = cache_has_key(cache, key_a);
-   expect_equal(result, 1, "cache_has_key after key added");
+   /* Then a couple of tests of disk_cache_put_key followed by disk_cache_has_key */
+   disk_cache_put_key(cache, key_a);
+   result = disk_cache_has_key(cache, key_a);
+   expect_equal(result, 1, "disk_cache_has_key after key added");
 
-   cache_put_key(cache, key_b);
-   result = cache_has_key(cache, key_b);
-   expect_equal(result, 1, "2nd cache_has_key after key added");
+   disk_cache_put_key(cache, key_b);
+   result = disk_cache_has_key(cache, key_b);
+   expect_equal(result, 1, "2nd disk_cache_has_key after key added");
 
    /* Test that a key with the same two bytes as an existing key
     * forces an eviction.
     */
-   cache_put_key(cache, key_a_collide);
-   result = cache_has_key(cache, key_a_collide);
+   disk_cache_put_key(cache, key_a_collide);
+   result = disk_cache_has_key(cache, key_a_collide);
    expect_equal(result, 1, "put_key of a colliding key lands in the cache");
 
-   result = cache_has_key(cache, key_a);
+   result = disk_cache_has_key(cache, key_a);
    expect_equal(result, 0, "put_key of a colliding key evicts from the cache");
 
    /* And finally test that we can re-add the original key to re-evict
     * the colliding key.
     */
-   cache_put_key(cache, key_a);
-   result = cache_has_key(cache, key_a);
+   disk_cache_put_key(cache, key_a);
+   result = disk_cache_has_key(cache, key_a);
    expect_equal(result, 1, "put_key of original key lands again");
 
-   result = cache_has_key(cache, key_a_collide);
+   result = disk_cache_has_key(cache, key_a_collide);
    expect_equal(result, 0, "put_key of orginal key evicts the colliding key");
 
-   cache_destroy(cache);
+   disk_cache_destroy(cache);
 }
 #endif /* ENABLE_SHADER_CACHE */
 
@@ -386,7 +386,7 @@ main(void)
 #ifdef ENABLE_SHADER_CACHE
    int err;
 
-   test_cache_create();
+   test_disk_cache_create();
 
    test_put_and_get();
 
diff --git a/src/util/disk_cache.c b/src/util/disk_cache.c
index 79242aa3c1..428787820e 100644
--- a/src/util/disk_cache.c
+++ b/src/util/disk_cache.c
@@ -53,7 +53,7 @@
 /* The number of keys that can be stored in the index. */
 #define CACHE_INDEX_MAX_KEYS (1 << CACHE_INDEX_KEY_BITS)
 
-struct program_cache {
+struct disk_cache {
    /* The path to the cache directory. */
    char *path;
 
@@ -131,11 +131,11 @@ concatenate_and_mkdir(void *ctx, char *path, char *name)
       return NULL;
 }
 
-struct program_cache *
-cache_create(void)
+struct disk_cache *
+disk_cache_create(void)
 {
    void *local;
-   struct program_cache *cache = NULL;
+   struct disk_cache *cache = NULL;
    char *path, *max_size_str;
    uint64_t max_size;
    int fd = -1;
@@ -210,7 +210,7 @@ cache_create(void)
          goto fail;
    }
 
-   cache = ralloc(NULL, struct program_cache);
+   cache = ralloc(NULL, struct disk_cache);
    if (cache == NULL)
       goto fail;
 
@@ -313,7 +313,7 @@ cache_create(void)
 }
 
 void
-cache_destroy(struct program_cache *cache)
+disk_cache_destroy(struct disk_cache *cache)
 {
    munmap(cache->index_mmap, cache->index_mmap_size);
 
@@ -326,7 +326,7 @@ cache_destroy(struct program_cache *cache)
  * Returns NULL if out of memory.
  */
 static char *
-get_cache_file(struct program_cache *cache, cache_key key)
+get_cache_file(struct disk_cache *cache, cache_key key)
 {
    char buf[41];
 
@@ -342,7 +342,7 @@ get_cache_file(struct program_cache *cache, cache_key key)
  * _get_cache_file above.
 */
 static void
-make_cache_file_directory(struct program_cache *cache, cache_key key)
+make_cache_file_directory(struct disk_cache *cache, cache_key key)
 {
    char *dir;
    char buf[41];
@@ -484,7 +484,7 @@ is_two_character_sub_directory(struct dirent *entry)
 }
 
 static void
-evict_random_item(struct program_cache *cache)
+evict_random_item(struct disk_cache *cache)
 {
    const char hex[] = "0123456789abcde";
    char *dir_path;
@@ -531,7 +531,7 @@ evict_random_item(struct program_cache *cache)
 }
 
 void
-cache_put(struct program_cache *cache,
+disk_cache_put(struct disk_cache *cache,
           cache_key key,
           const void *data,
           size_t size)
@@ -628,7 +628,7 @@ cache_put(struct program_cache *cache,
 }
 
 void *
-cache_get(struct program_cache *cache, cache_key key, size_t *size)
+disk_cache_get(struct disk_cache *cache, cache_key key, size_t *size)
 {
    int fd = -1, ret, len;
    struct stat sb;
@@ -679,7 +679,7 @@ cache_get(struct program_cache *cache, cache_key key, size_t *size)
 }
 
 void
-cache_put_key(struct program_cache *cache, cache_key key)
+disk_cache_put_key(struct disk_cache *cache, cache_key key)
 {
    uint32_t *key_chunk = (uint32_t *) key;
    int i = *key_chunk & CACHE_INDEX_KEY_MASK;
@@ -691,14 +691,14 @@ cache_put_key(struct program_cache *cache, cache_key key)
 }
 
 /* This function lets us test whether a given key was previously
- * stored in the cache with cache_put_key(). The implement is
+ * stored in the cache with disk_cache_put_key(). The implement is
  * efficient by not using syscalls or hitting the disk. It's not
  * race-free, but the races are benign. If we race with someone else
- * calling cache_put_key, then that's just an extra cache miss and an
+ * calling disk_cache_put_key, then that's just an extra cache miss and an
  * extra recompile.
  */
 bool
-cache_has_key(struct program_cache *cache, cache_key key)
+disk_cache_has_key(struct disk_cache *cache, cache_key key)
 {
    uint32_t *key_chunk = (uint32_t *) key;
    int i = *key_chunk & CACHE_INDEX_KEY_MASK;
diff --git a/src/util/disk_cache.h b/src/util/disk_cache.h
index d4d939883e..7e9cb809b5 100644
--- a/src/util/disk_cache.h
+++ b/src/util/disk_cache.h
@@ -36,6 +36,8 @@ extern "C" {
 
 typedef uint8_t cache_key[CACHE_KEY_SIZE];
 
+struct disk_cache;
+
 /* Provide inlined stub functions if the shader cache is disabled. */
 
 #ifdef ENABLE_SHADER_CACHE
@@ -49,12 +51,12 @@ typedef uint8_t cache_key[CACHE_KEY_SIZE];
  * This cache provides two distinct operations:
  *
  *   o Storage and retrieval of arbitrary objects by cryptographic
- *     name (or "key").  This is provided via cache_put() and
- *     cache_get().
+ *     name (or "key").  This is provided via disk_cache_put() and
+ *     disk_cache_get().
  *
  *   o The ability to store a key alone and check later whether the
- *     key was previously stored. This is provided via cache_put_key()
- *     and cache_has_key().
+ *     key was previously stored. This is provided via disk_cache_put_key()
+ *     and disk_cache_has_key().
  *
  * The put_key()/has_key() operations are conceptually identical to
  * put()/get() with no data, but are provided separately to allow for
@@ -66,32 +68,32 @@ typedef uint8_t cache_key[CACHE_KEY_SIZE];
  * names are computed). See mesa-sha1.h and _mesa_sha1_compute for
  * assistance in computing SHA-1 signatures.
  */
-struct program_cache *
-cache_create(void);
+struct disk_cache *
+disk_cache_create(void);
 
 /**
  * Destroy a cache object, (freeing all associated resources).
  */
 void
-cache_destroy(struct program_cache *cache);
+disk_cache_destroy(struct disk_cache *cache);
 
 /**
  * Store an item in the cache under the name \key.
  *
- * The item can be retrieved later with cache_get(), (unless the item has
+ * The item can be retrieved later with disk_cache_get(), (unless the item has
  * been evicted in the interim).
  *
- * Any call to cache_put() may cause an existing, random item to be
+ * Any call to disk_cache_put() may cause an existing, random item to be
  * evicted from the cache.
  */
 void
-cache_put(struct program_cache *cache, cache_key key,
-          const void *data, size_t size);
+disk_cache_put(struct disk_cache *cache, cache_key key,
+               const void *data, size_t size);
 
 /**
  * Retrieve an item previously stored in the cache with the name <key>.
  *
- * The item must have been previously stored with a call to cache_put().
+ * The item must have been previously stored with a call to disk_cache_put().
  *
  * If \size is non-NULL, then, on successful return, it will be set to the
  * size of the object.
@@ -102,67 +104,67 @@ cache_put(struct program_cache *cache, cache_key key,
  * caller should call free() it when finished.
  */
 void *
-cache_get(struct program_cache *cache, cache_key key, size_t *size);
+disk_cache_get(struct disk_cache *cache, cache_key key, size_t *size);
 
 /**
  * Store the name \key within the cache, (without any associated data).
  *
- * Later this key can be checked with cache_has_key(), (unless the key
+ * Later this key can be checked with disk_cache_has_key(), (unless the key
  * has been evicted in the interim).
  *
  * Any call to cache_record() may cause an existing, random key to be
  * evicted from the cache.
  */
 void
-cache_put_key(struct program_cache *cache, cache_key key);
+disk_cache_put_key(struct disk_cache *cache, cache_key key);
 
 /**
  * Test whether the name \key was previously recorded in the cache.
  *
- * Return value: True if cache_put_key() was previously called with
+ * Return value: True if disk_cache_put_key() was previously called with
  * \key, (and the key was not evicted in the interim).
  *
- * Note: cache_has_key() will only return true for keys passed to
- * cache_put_key(). Specifically, a call to cache_put() will not cause
- * cache_has_key() to return true for the same key.
+ * Note: disk_cache_has_key() will only return true for keys passed to
+ * disk_cache_put_key(). Specifically, a call to disk_cache_put() will not cause
+ * disk_cache_has_key() to return true for the same key.
  */
 bool
-cache_has_key(struct program_cache *cache, cache_key key);
+disk_cache_has_key(struct disk_cache *cache, cache_key key);
 
 #else
 
-static inline struct program_cache *
-cache_create(void)
+static inline struct disk_cache *
+disk_cache_create(void)
 {
    return NULL;
 }
 
 static inline void
-cache_destroy(struct program_cache *cache) {
+disk_cache_destroy(struct disk_cache *cache) {
    return;
 }
 
 static inline void
-cache_put(struct program_cache *cache, cache_key key,
+disk_cache_put(struct disk_cache *cache, cache_key key,
           const void *data, size_t size)
 {
    return;
 }
 
 static inline uint8_t *
-cache_get(struct program_cache *cache, cache_key key, size_t *size)
+disk_cache_get(struct disk_cache *cache, cache_key key, size_t *size)
 {
    return NULL;
 }
 
 static inline void
-cache_put_key(struct program_cache *cache, cache_key key)
+disk_cache_put_key(struct disk_cache *cache, cache_key key)
 {
    return;
 }
 
 static inline bool
-cache_has_key(struct program_cache *cache, cache_key key)
+disk_cache_has_key(struct disk_cache *cache, cache_key key)
 {
    return false;
 }