This allows the context manager to retrieve information about nodes that it holds a reference to, such as the current number of references to those nodes. Such information can for example be used to determine whether the servicemanager is the only process holding a reference to a node. This information can then be passed on to the process holding the node, which can in turn decide whether it wants to shut down to reduce resource usage.
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| @@ -200,6 +200,15 @@ struct binder_node_debug_info { · 199 unmodified lines | |||
| 200 | __u32 has_weak_ref; | 200 | __u32 has_weak_ref; |
| 201 | }; | 201 | }; |
| 202 | 202 | ||
| 203 | struct binder_node_info_for_ref { | ||
| 204 | __u32 handle; | ||
| 205 | __u32 strong_count; | ||
| 206 | __u32 weak_count; | ||
| 207 | __u32 reserved1; | ||
| 208 | __u32 reserved2; | ||
| 209 | __u32 reserved3; | ||
| 210 | }; | ||
| 211 | |||
| 203 | #define BINDER_WRITE_READ _IOWR('b', 1, struct binder_write_read) | 212 | #define BINDER_WRITE_READ _IOWR('b', 1, struct binder_write_read) |
| 204 | #define BINDER_SET_IDLE_TIMEOUT _IOW('b', 3, __s64) | 213 | #define BINDER_SET_IDLE_TIMEOUT _IOW('b', 3, __s64) |
| 205 | #define BINDER_SET_MAX_THREADS _IOW('b', 5, __u32) | 214 | #define BINDER_SET_MAX_THREADS _IOW('b', 5, __u32) |
| @@ -208,6 +217,7 @@ struct binder_node_debug_info { · 2 unmodified lines | |||
| 208 | #define BINDER_THREAD_EXIT _IOW('b', 8, __s32) | 217 | #define BINDER_THREAD_EXIT _IOW('b', 8, __s32) |
| 209 | #define BINDER_VERSION _IOWR('b', 9, struct binder_version) | 218 | #define BINDER_VERSION _IOWR('b', 9, struct binder_version) |
| 210 | #define BINDER_GET_NODE_DEBUG_INFO _IOWR('b', 11, struct binder_node_debug_info) | 219 | #define BINDER_GET_NODE_DEBUG_INFO _IOWR('b', 11, struct binder_node_debug_info) |
| 220 | #define BINDER_GET_NODE_INFO_FOR_REF _IOWR('b', 12, struct binder_node_info_for_ref) | ||
| 211 | 221 | ||
| 212 | /* | 222 | /* |
| 213 | * NOTE: Two special error codes you should check for when calling | 223 | * NOTE: Two special error codes you should check for when calling |