typedef struct ProcessCB { CHAR processName[OS_PCB_NAME_LEN]; /< Process name | 进程名称 */ UINT32 processID; /< Process ID = leader thread ID | 进程ID,由进程池分配,范围[0,64] / UINT16 processStatus; /**< [15:4] Process Status; [3:0] The number of threads currently running in the process | 这里设计很巧妙.用一个变量表示了两层逻辑 数量和状态,点赞! @note_good 从这里也可以看出一个进程可以有多个正在运行的任务/ UINT16 consoleID; /< The console id of task belongs | 任务的控制台id归属 */ UINT16 processMode; /< Kernel Mode:0; User Mode:1; | 模式指定为内核还是用户进程 / UINT32 parentProcessID; /**< Parent process ID | 父进程ID/ UINT32 exitCode; /< Process exit status | 进程退出状态码*/ LOS_DL_LIST pendList; /< Block list to which the process belongs | 进程所在的阻塞列表,进程因阻塞挂入相应的链表./ LOS_DL_LIST childrenList; /**< Children process list | 孩子进程都挂到这里,形成双循环链表/ LOS_DL_LIST exitChildList; /< Exit children process list | 要退出的孩子进程链表，白发人要送黑发人.*/ LOS_DL_LIST siblingList; /< Linkage in parent's children list | 兄弟进程链表, 56个民族是一家,来自同一个父进程./ ProcessGroup group; /**< Process group to which a process belongs | 所属进程组/ LOS_DL_LIST subordinateGroupList; /**< Linkage in group list | 进程组员链表/ UINT32 threadGroupID; /< Which thread group , is the main thread ID of the process */ LOS_DL_LIST threadSiblingList; /< List of threads under this process | 进程的线程(任务)列表 / volatile UINT32 threadNumber; /**< Number of threads alive under this process | 此进程下的活动线程数/ UINT32 threadCount; /< Total number of threads created under this process | 在此进程下创建的线程总数*/ // LOS_DL_LIST waitList; /< The process holds the waitLits to support wait/waitpid | 父进程通过进程等待的方式，回收子进程资源，获取子进程退出信息*/ #ifdef LOSCFG_KERNEL_SMP UINT32 timerCpu; /< CPU core number of this task is delayed or pended | 统计各线程被延期或阻塞的时间*/ #endif UINTPTR sigHandler; /< Signal handler | 信号处理函数,处理如 SIGSYS 等信号*/ sigset_t sigShare; /< Signal share bit | 信号共享位 sigset_t是个64位的变量,对应64种信号*/ #ifdef LOSCFG_KERNEL_LITEIPC ProcIpcInfo *ipcInfo; /< Memory pool for lite ipc | 用于进程间通讯的虚拟设备文件系统,设备装载点为 /dev/lite_ipc*/ #endif #ifdef LOSCFG_KERNEL_VM LosVmSpace vmSpace; /< VMM space for processes | 虚拟空间,描述进程虚拟内存的数据结构，linux称为内存描述符 */ #endif #ifdef LOSCFG_FS_VFS struct files_struct *files; /< Files held by the process | 进程所持有的所有文件，注者称之为进程的文件管理器/ #endif //每个进程都有属于自己的文件管理器,记录对文件的操作. 注意:一个文件可以被多个进程操作 timer_t timerID; /**< iTimer */
#ifdef LOSCFG_SECURITY_CAPABILITY //安全能力 User *user; ///< 进程的拥有者 UINT32 capability; ///< 安全能力范围 对应 CAP_SETGID #endif #ifdef LOSCFG_SECURITY_VID //虚拟ID映射功能 TimerIdMap timerIdMap; #endif #ifdef LOSCFG_DRIVERS_TZDRIVER struct Vnode execVnode; /< Exec bin of the process | 进程的可执行文件 */ #endif mode_t umask; ///< umask(user file-creatiopn mode mask)为用户文件创建掩码，是创建文件或文件夹时默认权限的基础。 #ifdef LOSCFG_KERNEL_CPUP OsCpupBase *processCpup; /< Process cpu usage | 进程占用CPU情况统计/ #endif struct rlimit *resourceLimit; ///< 每个进程在运行时系统不会无限制的允许单个进程不断的消耗资源，因此都会设置资源限制。 } LosProcessCB;
