1 | /* Copyright JS Foundation and other contributors, http://js.foundation |
2 | * |
3 | * Licensed under the Apache License, Version 2.0 (the "License"); |
4 | * you may not use this file except in compliance with the License. |
5 | * You may obtain a copy of the License at |
6 | * |
7 | * http://www.apache.org/licenses/LICENSE-2.0 |
8 | * |
9 | * Unless required by applicable law or agreed to in writing, software |
10 | * distributed under the License is distributed on an "AS IS" BASIS |
11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
12 | * See the License for the specific language governing permissions and |
13 | * limitations under the License. |
14 | */ |
15 | |
16 | /** |
17 | * Memory pool manager implementation |
18 | */ |
19 | |
20 | #include "jcontext.h" |
21 | #include "jmem.h" |
22 | #include "jrt-libc-includes.h" |
23 | |
24 | #define JMEM_ALLOCATOR_INTERNAL |
25 | #include "jmem-allocator-internal.h" |
26 | |
27 | #if ENABLED (JERRY_MEM_GC_BEFORE_EACH_ALLOC) |
28 | #include "ecma-gc.h" |
29 | #endif /* ENABLED (JERRY_MEM_GC_BEFORE_EACH_ALLOC) */ |
30 | |
31 | /** \addtogroup mem Memory allocation |
32 | * @{ |
33 | * |
34 | * \addtogroup poolman Memory pool manager |
35 | * @{ |
36 | */ |
37 | |
38 | /** |
39 | * Finalize pool manager |
40 | */ |
41 | void |
42 | jmem_pools_finalize (void) |
43 | { |
44 | jmem_pools_collect_empty (); |
45 | |
46 | JERRY_ASSERT (JERRY_CONTEXT (jmem_free_8_byte_chunk_p) == NULL); |
47 | #if ENABLED (JERRY_CPOINTER_32_BIT) |
48 | JERRY_ASSERT (JERRY_CONTEXT (jmem_free_16_byte_chunk_p) == NULL); |
49 | #endif /* ENABLED (JERRY_CPOINTER_32_BIT) */ |
50 | } /* jmem_pools_finalize */ |
51 | |
52 | /** |
53 | * Allocate a chunk of specified size |
54 | * |
55 | * @return pointer to allocated chunk, if allocation was successful, |
56 | * or NULL - if not enough memory. |
57 | */ |
58 | extern inline void * JERRY_ATTR_HOT JERRY_ATTR_ALWAYS_INLINE |
59 | jmem_pools_alloc (size_t size) /**< size of the chunk */ |
60 | { |
61 | #if ENABLED (JERRY_MEM_GC_BEFORE_EACH_ALLOC) |
62 | ecma_gc_run (); |
63 | #endif /* ENABLED (JERRY_MEM_GC_BEFORE_EACH_ALLOC) */ |
64 | |
65 | #if ENABLED (JERRY_CPOINTER_32_BIT) |
66 | if (size <= 8) |
67 | { |
68 | #else /* !ENABLED (JERRY_CPOINTER_32_BIT) */ |
69 | JERRY_ASSERT (size <= 8); |
70 | #endif /* ENABLED (JERRY_CPOINTER_32_BIT) */ |
71 | |
72 | if (JERRY_CONTEXT (jmem_free_8_byte_chunk_p) != NULL) |
73 | { |
74 | const jmem_pools_chunk_t *const chunk_p = JERRY_CONTEXT (jmem_free_8_byte_chunk_p); |
75 | |
76 | JMEM_VALGRIND_DEFINED_SPACE (chunk_p, sizeof (jmem_pools_chunk_t)); |
77 | JERRY_CONTEXT (jmem_free_8_byte_chunk_p) = chunk_p->next_p; |
78 | JMEM_VALGRIND_UNDEFINED_SPACE (chunk_p, sizeof (jmem_pools_chunk_t)); |
79 | |
80 | JMEM_HEAP_STAT_ALLOC (8); |
81 | return (void *) chunk_p; |
82 | } |
83 | else |
84 | { |
85 | void *chunk_p = jmem_heap_alloc_block_internal (8); |
86 | JMEM_HEAP_STAT_ALLOC (8); |
87 | return chunk_p; |
88 | } |
89 | |
90 | #if ENABLED (JERRY_CPOINTER_32_BIT) |
91 | } |
92 | |
93 | JERRY_ASSERT (size <= 16); |
94 | |
95 | if (JERRY_CONTEXT (jmem_free_16_byte_chunk_p) != NULL) |
96 | { |
97 | const jmem_pools_chunk_t *const chunk_p = JERRY_CONTEXT (jmem_free_16_byte_chunk_p); |
98 | |
99 | JMEM_VALGRIND_DEFINED_SPACE (chunk_p, sizeof (jmem_pools_chunk_t)); |
100 | JERRY_CONTEXT (jmem_free_16_byte_chunk_p) = chunk_p->next_p; |
101 | JMEM_VALGRIND_UNDEFINED_SPACE (chunk_p, sizeof (jmem_pools_chunk_t)); |
102 | |
103 | JMEM_HEAP_STAT_ALLOC (16); |
104 | return (void *) chunk_p; |
105 | } |
106 | else |
107 | { |
108 | void *chunk_p = jmem_heap_alloc_block_internal (16); |
109 | JMEM_HEAP_STAT_ALLOC (16); |
110 | return chunk_p; |
111 | } |
112 | #endif /* ENABLED (JERRY_CPOINTER_32_BIT) */ |
113 | } /* jmem_pools_alloc */ |
114 | |
115 | /** |
116 | * Free the chunk |
117 | */ |
118 | extern inline void JERRY_ATTR_HOT JERRY_ATTR_ALWAYS_INLINE |
119 | jmem_pools_free (void *chunk_p, /**< pointer to the chunk */ |
120 | size_t size) /**< size of the chunk */ |
121 | { |
122 | JERRY_ASSERT (chunk_p != NULL); |
123 | JMEM_HEAP_STAT_FREE (size); |
124 | |
125 | jmem_pools_chunk_t *const chunk_to_free_p = (jmem_pools_chunk_t *) chunk_p; |
126 | |
127 | JMEM_VALGRIND_DEFINED_SPACE (chunk_to_free_p, size); |
128 | |
129 | #if ENABLED (JERRY_CPOINTER_32_BIT) |
130 | if (size <= 8) |
131 | { |
132 | #else /* !ENABLED (JERRY_CPOINTER_32_BIT) */ |
133 | JERRY_ASSERT (size <= 8); |
134 | #endif /* ENABLED (JERRY_CPOINTER_32_BIT) */ |
135 | |
136 | chunk_to_free_p->next_p = JERRY_CONTEXT (jmem_free_8_byte_chunk_p); |
137 | JERRY_CONTEXT (jmem_free_8_byte_chunk_p) = chunk_to_free_p; |
138 | |
139 | #if ENABLED (JERRY_CPOINTER_32_BIT) |
140 | } |
141 | else |
142 | { |
143 | JERRY_ASSERT (size <= 16); |
144 | |
145 | chunk_to_free_p->next_p = JERRY_CONTEXT (jmem_free_16_byte_chunk_p); |
146 | JERRY_CONTEXT (jmem_free_16_byte_chunk_p) = chunk_to_free_p; |
147 | } |
148 | #endif /* ENABLED (JERRY_CPOINTER_32_BIT) */ |
149 | |
150 | JMEM_VALGRIND_NOACCESS_SPACE (chunk_to_free_p, size); |
151 | } /* jmem_pools_free */ |
152 | |
153 | /** |
154 | * Collect empty pool chunks |
155 | */ |
156 | void |
157 | jmem_pools_collect_empty (void) |
158 | { |
159 | jmem_pools_chunk_t *chunk_p = JERRY_CONTEXT (jmem_free_8_byte_chunk_p); |
160 | JERRY_CONTEXT (jmem_free_8_byte_chunk_p) = NULL; |
161 | |
162 | while (chunk_p) |
163 | { |
164 | JMEM_VALGRIND_DEFINED_SPACE (chunk_p, sizeof (jmem_pools_chunk_t)); |
165 | jmem_pools_chunk_t *const next_p = chunk_p->next_p; |
166 | JMEM_VALGRIND_NOACCESS_SPACE (chunk_p, sizeof (jmem_pools_chunk_t)); |
167 | |
168 | jmem_heap_free_block_internal (chunk_p, 8); |
169 | chunk_p = next_p; |
170 | } |
171 | |
172 | #if ENABLED (JERRY_CPOINTER_32_BIT) |
173 | chunk_p = JERRY_CONTEXT (jmem_free_16_byte_chunk_p); |
174 | JERRY_CONTEXT (jmem_free_16_byte_chunk_p) = NULL; |
175 | |
176 | while (chunk_p) |
177 | { |
178 | JMEM_VALGRIND_DEFINED_SPACE (chunk_p, sizeof (jmem_pools_chunk_t)); |
179 | jmem_pools_chunk_t *const next_p = chunk_p->next_p; |
180 | JMEM_VALGRIND_NOACCESS_SPACE (chunk_p, sizeof (jmem_pools_chunk_t)); |
181 | |
182 | jmem_heap_free_block_internal (chunk_p, 16); |
183 | chunk_p = next_p; |
184 | } |
185 | #endif /* ENABLED (JERRY_CPOINTER_32_BIT) */ |
186 | } /* jmem_pools_collect_empty */ |
187 | |
188 | /** |
189 | * @} |
190 | * @} |
191 | */ |
192 | |