PipeWire  0.3.21
mem.h
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1 /* PipeWire
2  *
3  * Copyright © 2018 Wim Taymans
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23  */
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 */
pw_map_range
parameters to map a memory range
Definition: mem.h:176
PW_MEMBLOCK_FLAG_READWRITE
@ PW_MEMBLOCK_FLAG_READWRITE
Definition: mem.h:44
res
static uint32_t int int res
Definition: core.h:326
pw_mempool_events::version
uint32_t version
Definition: mem.h:92
pw_memblock::pool
struct pw_mempool * pool
owner pool
Definition: mem.h:70
pw_mempool
Definition: mem.h:63
memblock
Definition: mem.c:108
memmap::link
struct spa_list link
Definition: mem.c:130
pw_mempool_import_map
SPA_EXPORT 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:612
pw_memmap
a mapped region of a pw_memblock
Definition: mem.h:81
memblock::link
struct spa_list link
Definition: mem.c:110
PW_MEMMAP_FLAG_WRITE
@ PW_MEMMAP_FLAG_WRITE
map in write mode
Definition: mem.h:50
memmap::mapping
struct mapping * mapping
Definition: mem.c:129
pw_mempool_events::added
void(* added)(void *data, struct pw_memblock *block)
a new memory block is added to the pool
Definition: mem.h:98
pw_mempool_events::removed
void(* removed)(void *data, struct pw_memblock *block)
a memory block is removed from the pool
Definition: mem.h:101
pw_map::pw_map_lookup
static void * pw_map_lookup(struct pw_map *map, uint32_t id)
Find an item in the map.
Definition: map.h:169
mempool
Definition: mem.c:96
pw_map::pw_map_remove
static void pw_map_remove(struct pw_map *map, uint32_t id)
Remove an item at index.
Definition: map.h:157
mapping::ptr
void * ptr
Definition: mem.c:123
MFD_CLOEXEC
#define MFD_CLOEXEC
Definition: mem.c:66
memmap
Definition: mem.c:127
pw_map_range::start
uint32_t start
Definition: mem.h:177
pw_mempool_destroy
void pw_mempool_destroy(struct pw_mempool *pool)
Clear and destroy a pool.
Definition: mem.c:170
pw_memblock::id
uint32_t id
unique id
Definition: mem.h:71
pw_log::pw_log_error
#define pw_log_error(...)
Log an error message.
MFD_ALLOW_SEALING
#define MFD_ALLOW_SEALING
Definition: mem.c:70
mempool::blocks
struct spa_list blocks
Definition: mem.c:104
pw_mempool_find_fd
struct pw_memblock * pw_mempool_find_fd(struct pw_mempool *pool, int fd)
Find memblock for given fd.
Definition: mem.c:761
pw_mempool_destroy
void pw_mempool_destroy(struct pw_mempool *pool)
Clear and destroy a pool.
Definition: mem.c:170
PW_MEMBLOCK_FLAG_MAP
@ PW_MEMBLOCK_FLAG_MAP
mmap the fd
Definition: mem.h:40
pw_map::pw_map_init
static void pw_map_init(struct pw_map *map, size_t size, size_t extend)
Initialize a map.
Definition: map.h:76
pw_memmap::block
struct pw_memblock * block
owner memblock
Definition: mem.h:82
PW_MEMBLOCK_FLAG_DONT_NOTIFY
@ PW_MEMBLOCK_FLAG_DONT_NOTIFY
don't notify events
Definition: mem.h:42
pw_mempool_find_ptr
struct pw_memblock * pw_mempool_find_ptr(struct pw_mempool *pool, const void *ptr)
Find memblock for given ptr.
Definition: mem.c:728
pw_memblock::pw_memblock_flags
pw_memblock_flags
Flags passed to pw_mempool_alloc()
Definition: mem.h:35
pw_mempool_clear
void pw_mempool_clear(struct pw_mempool *pool)
Clear a pool.
Definition: mem.c:158
mempool::pagesize
uint32_t pagesize
Definition: mem.c:105
data
Definition: filter.c:74
mapping::block
struct memblock * block
Definition: mem.c:117
pw_mempool_find_ptr
SPA_EXPORT struct pw_memblock * pw_mempool_find_ptr(struct pw_mempool *pool, const void *ptr)
Find memblock for given ptr.
Definition: mem.c:728
pw_memblock::size
uint32_t size
size of memory
Definition: mem.h:76
PW_MEMMAP_FLAG_READ
@ PW_MEMMAP_FLAG_READ
map in read mode
Definition: mem.h:49
pw_memblock::flags
uint32_t flags
flags for the memory block on of enum pw_memblock_flags
Definition: mem.h:73
PW_MEMMAP_FLAG_PRIVATE
@ PW_MEMMAP_FLAG_PRIVATE
writes will be private
Definition: mem.h:53
pw_mempool_map_id
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:407
pw_mempool::props
struct pw_properties * props
Definition: mem.h:64
PW_MEMMAP_FLAG_READWRITE
@ PW_MEMMAP_FLAG_READWRITE
Definition: mem.h:55
PW_MEMBLOCK_FLAG_DONT_CLOSE
@ PW_MEMBLOCK_FLAG_DONT_CLOSE
don't close fd
Definition: mem.h:41
pw_memblock::pw_mempool_alloc
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:463
pw_mempool_emit_added
#define pw_mempool_emit_added(p, b)
Definition: mem.c:93
impl
Definition: control.c:33
pw_mempool_add_listener
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:191
pw_map_range::offset
uint32_t offset
offset in first page with start of data
Definition: mem.h:178
pw_memmap::ptr
void * ptr
mapped pointer
Definition: mem.h:83
mapping::link
struct spa_list link
Definition: mem.c:122
mempool::link
struct spa_list link
Definition: mem.c:99
pw_memmap::size
uint32_t size
size in memblock
Definition: mem.h:86
pw_memmap_flags
pw_memmap_flags
Definition: mem.h:47
pw_map::pw_map_insert_new
static uint32_t pw_map_insert_new(struct pw_map *map, void *data)
Insert data in the map.
Definition: map.h:105
mapping::do_unmap
unsigned int do_unmap
Definition: mem.c:121
pw_memmap_free
SPA_EXPORT int pw_memmap_free(struct pw_memmap *map)
Unmap a region.
Definition: mem.c:422
PW_MEMBLOCK_FLAG_SEAL
@ PW_MEMBLOCK_FLAG_SEAL
seal the fd
Definition: mem.h:39
pw_mempool_import_block
SPA_EXPORT struct pw_memblock * pw_mempool_import_block(struct pw_mempool *pool, struct pw_memblock *mem)
Import a block from another pool.
Definition: mem.c:601
pw_memmap::flags
uint32_t flags
flags for the mapping on of enum pw_memmap_flags
Definition: mem.h:84
pw_mempool_find_tag
SPA_EXPORT 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:773
pw_mempool_find_id
struct pw_memblock * pw_mempool_find_id(struct pw_mempool *pool, uint32_t id)
Find memblock for given id.
Definition: mem.c:747
memmap::this
struct pw_memmap this
Definition: mem.c:128
pw_mempool_events::destroy
void(* destroy)(void *data)
the pool is destroyed
Definition: mem.h:95
F_SEAL_GROW
#define F_SEAL_GROW
Definition: mem.c:85
memblock::memmaps
struct spa_list memmaps
Definition: mem.c:112
pw_mempool_events
Definition: mem.h:90
pw_memblock_map
SPA_EXPORT 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:360
memblock::this
struct pw_memblock this
Definition: mem.c:109
mapping::ref
int ref
Definition: mem.c:118
PW_MEMBLOCK_FLAG_WRITABLE
@ PW_MEMBLOCK_FLAG_WRITABLE
memory is writable
Definition: mem.h:38
pw_memblock::fd
int fd
fd
Definition: mem.h:75
pw_map_range::size
uint32_t size
page aligned offset to map
Definition: mem.h:179
mapping::size
uint32_t size
Definition: mem.c:120
pw_memblock::ref
int ref
refcount
Definition: mem.h:72
mapping
Definition: mem.c:116
F_ADD_SEALS
#define F_ADD_SEALS
Definition: mem.c:80
mapping::offset
uint32_t offset
Definition: mem.c:119
pw_mempool_add_listener
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:191
pw_log::pw_log_debug
#define pw_log_debug(...)
Log a debug message.
pw_log::pw_log_warn
#define pw_log_warn(...)
Log a warning message.
pw_mempool_import
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:564
pw_mempool_map_id
SPA_EXPORT 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:407
F_SEAL_SEAL
#define F_SEAL_SEAL
Definition: mem.c:83
PW_MEMBLOCK_FLAG_NONE
@ PW_MEMBLOCK_FLAG_NONE
Definition: mem.h:36
F_SEAL_SHRINK
#define F_SEAL_SHRINK
Definition: mem.c:84
pw_mempool_new
struct pw_mempool * pw_mempool_new(struct pw_properties *props)
Create a new memory pool.
Definition: mem.c:133
pw_memblock::map
struct pw_memmap * map
optional map when PW_MEMBLOCK_FLAG_MAP was given
Definition: mem.h:77
NAME
#define NAME
Definition: mem.c:44
pw_mempool_emit_removed
#define pw_mempool_emit_removed(p, b)
Definition: mem.c:94
pw_mempool_clear
void pw_mempool_clear(struct pw_mempool *pool)
Clear a pool.
Definition: mem.c:158
pw_map::pw_map_clear
static void pw_map_clear(struct pw_map *map)
Clear a map.
Definition: map.h:87
pw_mempool_import_block
struct pw_memblock * pw_mempool_import_block(struct pw_mempool *pool, struct pw_memblock *mem)
Import a block from another pool.
Definition: mem.c:601
map.h
pw_mempool_remove_id
int pw_mempool_remove_id(struct pw_mempool *pool, uint32_t id)
Remove a memblock for given id.
Definition: mem.c:664
pw_memmap::offset
uint32_t offset
offset in memblock
Definition: mem.h:85
pw_memblock::pw_memblock_free
SPA_EXPORT void pw_memblock_free(struct pw_memblock *block)
Free a memblock.
Definition: mem.c:688
pw_memblock
A memory pool is a collection of pw_memblocks.
Definition: mem.h:69
pw_mempool_import_map
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:612
pw_memmap::tag
uint32_t tag[5]
user tag
Definition: mem.h:87
log.h
pw_mempool_import
SPA_EXPORT 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:564
mempool::map
struct pw_map map
Definition: mem.c:103
pw_mempool_find_fd
SPA_EXPORT struct pw_memblock * pw_mempool_find_fd(struct pw_mempool *pool, int fd)
Find memblock for given fd.
Definition: mem.c:761
PW_MEMBLOCK_FLAG_READABLE
@ PW_MEMBLOCK_FLAG_READABLE
memory is readable
Definition: mem.h:37
PW_MEMMAP_FLAG_NONE
@ PW_MEMMAP_FLAG_NONE
Definition: mem.h:48
pw_mempool_new
struct pw_mempool * pw_mempool_new(struct pw_properties *props)
Create a new memory pool.
Definition: mem.c:133
pw_mempool_emit_destroy
#define pw_mempool_emit_destroy(p)
Definition: mem.c:92
mempool::listener_list
struct spa_hook_list listener_list
Definition: mem.c:101
mempool::this
struct pw_mempool this
Definition: mem.c:97
impl::this
struct pw_control this
Definition: control.c:34
pw_map
A map.
Definition: map.h:50
pw_mempool_remove_id
int pw_mempool_remove_id(struct pw_mempool *pool, uint32_t id)
Remove a memblock for given id.
Definition: mem.c:664
pw_memmap_free
int pw_memmap_free(struct pw_memmap *map)
Unmap a region.
Definition: mem.c:422
mem.h
properties.h
PW_MEMMAP_FLAG_TWICE
@ PW_MEMMAP_FLAG_TWICE
map the same area twice after each other, creating a circular ringbuffer
Definition: mem.h:51
pw_mempool_find_id
SPA_EXPORT struct pw_memblock * pw_mempool_find_id(struct pw_mempool *pool, uint32_t id)
Find memblock for given id.
Definition: mem.c:747
pw_memblock_map
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:360
memblock::mappings
struct spa_list mappings
Definition: mem.c:111
PW_MEMMAP_FLAG_LOCKED
@ PW_MEMMAP_FLAG_LOCKED
lock the memory into RAM
Definition: mem.h:54
pw_memblock::type
uint32_t type
type of the fd, one of enum spa_data_type
Definition: mem.h:74
pw_properties
A collection of key/value pairs.
Definition: properties.h:45
pw_properties::pw_properties_free
SPA_EXPORT void pw_properties_free(struct pw_properties *properties)
Free a properties object.
Definition: properties.c:356
pw_mempool_find_tag
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:773