Function report |
Source Code:ipc\util.c |
Create Date:2022-07-28 16:39:35 |
Last Modify:2022-05-23 18:05:07 | Copyright©Brick |
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Name:Insert new IPC object into idr tree, and set sequence number and id* in the correct order.* Especially:* - the sequence number must be set before inserting the object into the idr,* because the sequence number is accessed without a lock.
Proto:static inline int ipc_idr_alloc(struct ipc_ids *ids, struct kern_ipc_perm *new)
Type:int
Parameter:
Type | Parameter | Name |
---|---|---|
struct ipc_ids * | ids | |
struct kern_ipc_perm * | new |
203 | next_id = -1 |
222 | If next_id < 0 Then |
225 | max_idx = max - return maximum of two values of the same or compatible types*@x: first value*@y: second value(in_use * 3 / 2, ipc_min_cycle) |
226 | max_idx = min - return minimum of two values of the same or compatible types*@x: first value*@y: second value(max_idx, ipc_mni) |
232 | If idx >= 0 Then |
252 | Else |
253 | seq = ipcid_to_seqx(next_id) |
257 | If idx >= 0 Then id = (seq << ipcmni_seq_shift()) + idx |
259 | Return idx |
Name | Describe |
---|---|
ipc_addid | pc_addid - add an ipc identifier*@ids: ipc identifier set*@new: new ipc permission set*@limit: limit for the number of used ids* Add an entry 'new' to the ipc ids idr |
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