| 65 | ****************************************************************************/ |
| 66 | |
| 67 | int nxtask_delete(pid_t pid) |
| 68 | { |
| 69 | FAR struct tcb_s *dtcb; |
| 70 | FAR struct tcb_s *rtcb; |
| 71 | |
| 72 | /* Check if the task to delete is the calling task: PID=0 means to delete |
| 73 | * the calling task. In this case, task_delete() is much like exit() |
| 74 | * except that it obeys the cancellation semantics. |
| 75 | */ |
| 76 | |
| 77 | rtcb = this_task(); |
| 78 | if (pid == 0) |
| 79 | { |
| 80 | pid = rtcb->pid; |
| 81 | } |
| 82 | |
| 83 | /* Get the TCB of the task to be deleted */ |
| 84 | |
| 85 | dtcb = nxsched_get_tcb(pid); |
| 86 | if (dtcb == NULL) |
| 87 | { |
| 88 | /* The pid does not correspond to any known thread. The task |
| 89 | * has probably already exited. |
| 90 | */ |
| 91 | |
| 92 | return -ESRCH; |
| 93 | } |
| 94 | |
| 95 | /* Only tasks and kernel threads can be deleted with this interface |
| 96 | * (The semantics of the call should be sufficient to prohibit this). |
| 97 | */ |
| 98 | |
| 99 | DEBUGASSERT((dtcb->flags & TCB_FLAG_TTYPE_MASK) != TCB_FLAG_TTYPE_PTHREAD); |
| 100 | |
| 101 | /* Non-privileged tasks and pthreads may not delete privileged kernel |
| 102 | * threads. |
| 103 | * |
| 104 | * REVISIT: We will need to look at this again in the future if/when |
| 105 | * permissions are supported and a user task might also be privileged. |
| 106 | */ |
| 107 | |
| 108 | if (((rtcb->flags & TCB_FLAG_TTYPE_MASK) != TCB_FLAG_TTYPE_KERNEL) && |
| 109 | ((dtcb->flags & TCB_FLAG_TTYPE_MASK) == TCB_FLAG_TTYPE_KERNEL)) |
| 110 | { |
| 111 | return -EACCES; |
| 112 | } |
| 113 | |
| 114 | /* Check if the task to delete is the calling task */ |
| 115 | |
| 116 | if (pid == rtcb->pid) |
| 117 | { |
| 118 | /* If it is, then what we really wanted to do was exit. Note that we |
| 119 | * don't bother to unlock the TCB since it will be going away. |
| 120 | */ |
| 121 | |
| 122 | _exit(EXIT_SUCCESS); |
| 123 | } |
| 124 |
no test coverage detected