1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/*
* Copyright © 2014 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef DISK_CACHE_H
#define DISK_CACHE_H
#ifdef ENABLE_SHADER_CACHE
#include <dlfcn.h>
#endif
#include <stdint.h>
#include <stdbool.h>
#include <sys/stat.h>
#ifdef __cplusplus
extern "C" {
#endif
/* Size of cache keys in bytes. */
#define CACHE_KEY_SIZE 20
typedef uint8_t cache_key[CACHE_KEY_SIZE];
struct disk_cache;
static inline bool
disk_cache_get_function_timestamp(void *ptr, uint32_t* timestamp)
{
#ifdef ENABLE_SHADER_CACHE
Dl_info info;
struct stat st;
if (!dladdr(ptr, &info) || !info.dli_fname) {
return false;
}
if (stat(info.dli_fname, &st)) {
return false;
}
*timestamp = st.st_mtime;
return true;
#else
return false;
#endif
}
/* Provide inlined stub functions if the shader cache is disabled. */
#ifdef ENABLE_SHADER_CACHE
/**
* Create a new cache object.
*
* This function creates the handle necessary for all subsequent cache_*
* functions.
*
* This cache provides two distinct operations:
*
* o Storage and retrieval of arbitrary objects by cryptographic
* 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 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
* a more efficient implementation.
*
* In all cases, the keys are sequences of 20 bytes. It is anticipated
* that callers will compute appropriate SHA-1 signatures for keys,
* (though nothing in this implementation directly relies on how the
* names are computed). See mesa-sha1.h and _mesa_sha1_compute for
* assistance in computing SHA-1 signatures.
*/
struct disk_cache *
disk_cache_create(const char *gpu_name, const char *timestamp);
/**
* Destroy a cache object, (freeing all associated resources).
*/
void
disk_cache_destroy(struct disk_cache *cache);
/**
* Remove the item in the cache under the name \key.
*/
void
disk_cache_remove(struct disk_cache *cache, cache_key key);
/**
* Store an item in the cache under the name \key.
*
* The item can be retrieved later with disk_cache_get(), (unless the item has
* been evicted in the interim).
*
* Any call to disk_cache_put() may cause an existing, random item to be
* evicted from the cache.
*/
void
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 disk_cache_put().
*
* If \size is non-NULL, then, on successful return, it will be set to the
* size of the object.
*
* \return A pointer to the stored object if found. NULL if the object
* is not found, or if any error occurs, (memory allocation failure,
* filesystem error, etc.). The returned data is malloc'ed so the
* caller should call free() it when finished.
*/
void *
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 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
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 disk_cache_put_key() was previously called with
* \key, (and the key was not evicted in the interim).
*
* 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
disk_cache_has_key(struct disk_cache *cache, cache_key key);
#else
static inline struct disk_cache *
disk_cache_create(const char *gpu_name, const char *timestamp)
{
return NULL;
}
static inline void
disk_cache_destroy(struct disk_cache *cache) {
return;
}
static inline void
disk_cache_put(struct disk_cache *cache, cache_key key,
const void *data, size_t size)
{
return;
}
static inline void
disk_cache_remove(struct disk_cache *cache, cache_key key)
{
return;
}
static inline uint8_t *
disk_cache_get(struct disk_cache *cache, cache_key key, size_t *size)
{
return NULL;
}
static inline void
disk_cache_put_key(struct disk_cache *cache, cache_key key)
{
return;
}
static inline bool
disk_cache_has_key(struct disk_cache *cache, cache_key key)
{
return false;
}
#endif /* ENABLE_SHADER_CACHE */
#ifdef __cplusplus
}
#endif
#endif /* CACHE_H */
|
