函数逻辑报告 |
Source Code:ipc\sem.c |
Create Date:2022-07-27 18:20:10 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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函数名称:This function handles some semctl commands which require the rwsem* to be held in write mode.* NOTE: no locks must be held, the rwsem is taken inside this function.
函数原型:static int semctl_down(struct ipc_namespace *ns, int semid, int cmd, struct semid64_ds *semid64)
返回类型:int
参数:
类型 | 参数 | 名称 |
---|---|---|
struct ipc_namespace * | ns | |
int | semid | |
int | cmd | |
struct semid64_ds * | semid64 |
1590 | lock for writing |
1595 | 如果是错误则 |
1597 | 转到:out_unlock1 |
1602 | err等于security_sem_semctl( & permissions .. see ipc.h , cmd) |
1603 | 如果err则转到:out_unlock1 |
1607 | 当:cmd恒等于move resource |
1611 | 转到:out_up |
1612 | 当:cmd恒等于set ipc_perm options |
1614 | err等于pc_update_perm - update the permissions of an ipc object*@in: the permission given as input.*@out: the permission of the ipc to set. |
1615 | 如果err则转到:out_unlock0 |
1618 | 退出 |
1619 | 默认 |
1621 | 转到:out_unlock1 |
1624 | out_unlock0 : |
1625 | sem_unlock(sma, - 1) |
1626 | out_unlock1 : |
1628 | out_up : |
1629 | lease a write lock |
1630 | 返回:err |
名称 | 描述 |
---|---|
ksys_semctl | |
compat_ksys_semctl |
源代码转换工具 开放的插件接口 | X |
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支持:c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现:逻辑报告 代码生成和批量转换代码 |