PipeWire  0.3.24
mem.h
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1 /* PipeWire
2  *
3  * Copyright © 2018 Wim Taymans
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24 
25 #ifndef PIPEWIRE_MEM_H
26 #define PIPEWIRE_MEM_H
27 
28 #include <pipewire/properties.h>
29 
30 #ifdef __cplusplus
31 extern "C" {
32 #endif
33 
39  PW_MEMBLOCK_FLAG_SEAL = (1 << 2),
40  PW_MEMBLOCK_FLAG_MAP = (1 << 3),
45 };
46 
49  PW_MEMMAP_FLAG_READ = (1 << 0),
50  PW_MEMMAP_FLAG_WRITE = (1 << 1),
51  PW_MEMMAP_FLAG_TWICE = (1 << 2),
54  PW_MEMMAP_FLAG_LOCKED = (1 << 4),
56 };
57 
58 struct pw_memchunk;
59 
63 struct pw_mempool {
65 };
66 
69 struct pw_memblock {
70  struct pw_mempool *pool;
71  uint32_t id;
72  int ref;
73  uint32_t flags;
74  uint32_t type;
75  int fd;
76  uint32_t size;
77  struct pw_memmap *map;
78 };
79 
81 struct pw_memmap {
82  struct pw_memblock *block;
83  void *ptr;
84  uint32_t flags;
85  uint32_t offset;
86  uint32_t size;
87  uint32_t tag[5];
88 };
89 
91 #define PW_VERSION_MEMPOOL_EVENTS 0
92  uint32_t version;
93 
95  void (*destroy) (void *data);
96 
98  void (*added) (void *data, struct pw_memblock *block);
99 
101  void (*removed) (void *data, struct pw_memblock *block);
102 };
103 
106 
108 void pw_mempool_add_listener(struct pw_mempool *pool,
109  struct spa_hook *listener,
110  const struct pw_mempool_events *events,
111  void *data);
112 
114 void pw_mempool_clear(struct pw_mempool *pool);
115 
117 void pw_mempool_destroy(struct pw_mempool *pool);
118 
119 
122  enum pw_memblock_flags flags, uint32_t type, size_t size);
123 
126  struct pw_memblock *mem);
127 
130  enum pw_memblock_flags flags, uint32_t type, int fd);
131 
133 void pw_memblock_free(struct pw_memblock *mem);
134 
136 static inline void pw_memblock_unref(struct pw_memblock *mem)
137 {
138  if (--mem->ref == 0)
139  pw_memblock_free(mem);
140 }
141 
143 int pw_mempool_remove_id(struct pw_mempool *pool, uint32_t id);
144 
146 struct pw_memblock * pw_mempool_find_ptr(struct pw_mempool *pool, const void *ptr);
147 
149 struct pw_memblock * pw_mempool_find_id(struct pw_mempool *pool, uint32_t id);
150 
152 struct pw_memblock * pw_mempool_find_fd(struct pw_mempool *pool, int fd);
153 
154 
156 struct pw_memmap * pw_memblock_map(struct pw_memblock *block,
157  enum pw_memmap_flags flags, uint32_t offset, uint32_t size,
158  uint32_t tag[5]);
159 
161 struct pw_memmap * pw_mempool_map_id(struct pw_mempool *pool, uint32_t id,
162  enum pw_memmap_flags flags, uint32_t offset, uint32_t size,
163  uint32_t tag[5]);
164 
165 struct pw_memmap * pw_mempool_import_map(struct pw_mempool *pool,
166  struct pw_mempool *other, void *data, uint32_t size, uint32_t tag[5]);
167 
169 struct pw_memmap * pw_mempool_find_tag(struct pw_mempool *pool, uint32_t tag[5], size_t size);
170 
172 int pw_memmap_free(struct pw_memmap *map);
173 
174 
176 struct pw_map_range {
177  uint32_t start;
178  uint32_t offset;
179  uint32_t size;
180 };
181 
182 #define PW_MAP_RANGE_INIT (struct pw_map_range){ 0, }
183 
186 static inline void pw_map_range_init(struct pw_map_range *range,
187  uint32_t offset, uint32_t size,
188  uint32_t page_size)
189 {
190  range->offset = SPA_ROUND_DOWN_N(offset, page_size);
191  range->start = offset - range->offset;
192  range->size = SPA_ROUND_UP_N(range->start + size, page_size);
193 }
194 
195 
196 #ifdef __cplusplus
197 }
198 #endif
199 
200 #endif /* PIPEWIRE_MEM_H */
parameters to map a memory range
Definition: mem.h:176
struct pw_memblock * pw_mempool_find_id(struct pw_mempool *pool, uint32_t id)
Find memblock for given id.
Definition: mem.c:751
A collection of key/value pairs.
Definition: properties.h:45
lock the memory into RAM
Definition: mem.h:54
int pw_memmap_free(struct pw_memmap *map)
Unmap a region.
Definition: mem.c:426
struct pw_memmap * map
optional map when PW_MEMBLOCK_FLAG_MAP was given
Definition: mem.h:77
struct pw_memblock * pw_mempool_import(struct pw_mempool *pool, enum pw_memblock_flags flags, uint32_t type, int fd)
Import an fd into the pool.
Definition: mem.c:568
uint32_t offset
offset in first page with start of data
Definition: mem.h:178
Definition: mem.h:55
struct pw_memblock * block
owner memblock
Definition: mem.h:82
struct pw_memblock * pw_mempool_find_ptr(struct pw_mempool *pool, const void *ptr)
Find memblock for given ptr.
Definition: mem.c:732
void * ptr
mapped pointer
Definition: mem.h:83
uint32_t type
type of the fd, one of enum spa_data_type
Definition: mem.h:74
pw_memmap_flags
Definition: mem.h:47
Definition: mem.h:36
mmap the fd
Definition: mem.h:40
pw_memblock_flags
Flags passed to pw_mempool_alloc()
Definition: mem.h:35
uint32_t version
Definition: mem.h:92
void pw_mempool_add_listener(struct pw_mempool *pool, struct spa_hook *listener, const struct pw_mempool_events *events, void *data)
Listen for events.
Definition: mem.c:195
uint32_t flags
flags for the memory block on of enum pw_memblock_flags
Definition: mem.h:73
writes will be private
Definition: mem.h:53
uint32_t size
size in memblock
Definition: mem.h:86
int fd
fd
Definition: mem.h:75
struct pw_memblock * pw_mempool_find_fd(struct pw_mempool *pool, int fd)
Find memblock for given fd.
Definition: mem.c:765
Definition: mem.h:44
memory is writable
Definition: mem.h:38
uint32_t offset
offset in memblock
Definition: mem.h:85
struct pw_mempool * pool
owner pool
Definition: mem.h:70
uint32_t start
Definition: mem.h:177
map in read mode
Definition: mem.h:49
struct pw_mempool * pw_mempool_new(struct pw_properties *props)
Create a new memory pool.
Definition: mem.c:137
void(* destroy)(void *data)
the pool is destroyed
Definition: mem.h:95
void(* added)(void *data, struct pw_memblock *block)
a new memory block is added to the pool
Definition: mem.h:98
memory is readable
Definition: mem.h:37
struct pw_memmap * pw_mempool_find_tag(struct pw_mempool *pool, uint32_t tag[5], size_t size)
find a map with the given tag
Definition: mem.c:777
a mapped region of a pw_memblock
Definition: mem.h:81
uint32_t flags
flags for the mapping on of enum pw_memmap_flags
Definition: mem.h:84
void pw_mempool_clear(struct pw_mempool *pool)
Clear a pool.
Definition: mem.c:162
uint32_t id
unique id
Definition: mem.h:71
int ref
refcount
Definition: mem.h:72
map the same area twice after each other, creating a circular ringbuffer
Definition: mem.h:51
A memory pool is a collection of pw_memblocks.
Definition: mem.h:69
uint32_t tag[5]
user tag
Definition: mem.h:87
Definition: mem.h:48
don&#39;t close fd
Definition: mem.h:41
struct pw_memmap * pw_memblock_map(struct pw_memblock *block, enum pw_memmap_flags flags, uint32_t offset, uint32_t size, uint32_t tag[5])
Map a region of a memory block.
Definition: mem.c:364
don&#39;t notify events
Definition: mem.h:42
uint32_t size
size of memory
Definition: mem.h:76
seal the fd
Definition: mem.h:39
void(* removed)(void *data, struct pw_memblock *block)
a memory block is removed from the pool
Definition: mem.h:101
int pw_mempool_remove_id(struct pw_mempool *pool, uint32_t id)
Remove a memblock for given id.
Definition: mem.c:668
struct pw_properties * props
Definition: mem.h:64
SPA_EXPORT void pw_memblock_free(struct pw_memblock *block)
Free a memblock.
Definition: mem.c:692
struct pw_memblock * pw_mempool_import_block(struct pw_mempool *pool, struct pw_memblock *mem)
Import a block from another pool.
Definition: mem.c:605
struct pw_memmap * pw_mempool_map_id(struct pw_mempool *pool, uint32_t id, enum pw_memmap_flags flags, uint32_t offset, uint32_t size, uint32_t tag[5])
Map a region of a memory block with id.
Definition: mem.c:411
Definition: mem.h:63
uint32_t size
page aligned offset to map
Definition: mem.h:179
void pw_mempool_destroy(struct pw_mempool *pool)
Clear and destroy a pool.
Definition: mem.c:174
map in write mode
Definition: mem.h:50
SPA_EXPORT struct pw_memblock * pw_mempool_alloc(struct pw_mempool *pool, enum pw_memblock_flags flags, uint32_t type, size_t size)
Create a new memblock.
Definition: mem.c:467
Definition: filter.c:74
Definition: mem.h:90
struct pw_memmap * pw_mempool_import_map(struct pw_mempool *pool, struct pw_mempool *other, void *data, uint32_t size, uint32_t tag[5])
Definition: mem.c:616