kernel/fiasco/src/kern/thread_state.cpp

   1 INTERFACE:
   2
   3 // When changing these constants, change them also in shared/shortcut.h!
   4 enum Thread_state
   5 {
   6   Thread_invalid          = 0,    // tcb unallocated
   7   Thread_ready            = 0x1,  // can be scheduled
   8   Thread_drq_ready        = 0x2,
   9   Thread_receiving        = 0x4,  // waiting for message from specified sender
  10   Thread_ready_mask       = Thread_ready | Thread_drq_ready,
  11   Thread_polling          = 0x8,  // waiting to send message to specified rcvr
  12   Thread_ipc_in_progress  = 0x10, // an IPC operation has not been finished
  13   Thread_send_in_progress = 0x20, // an IPC send operation hasn't been finished
  14   // the ipc handshake bits needs to be in the first byte,
  15   // the shortcut depends on it
  16
  17   Thread_cancel               = 0x40,// state has been changed -- cancel activity
  18   Thread_dead                 = 0x200,// tcb allocated, but inactive (not in any q)
  19   Thread_suspended            = 0x400,// thread must not execute user code
  20   // 0x800, 0x1000 are free
  21   Thread_delayed_deadline     = 0x2000, // delayed until periodic deadline
  22   Thread_delayed_ipc          = 0x4000, // delayed until periodic ipc event
  23   Thread_fpu_owner            = 0x8000, // currently owns the fpu
  24   Thread_alien                = 0x10000, // Thread is an alien, is not allowed
  25                                      // to do system calls
  26   Thread_dis_alien            = 0x20000, // Thread is an alien, however the next
  27                                      // system call is allowed
  28   Thread_in_exception         = 0x40000, // Thread has sent an exception but still
  29                                      // got no reply
  30   Thread_transfer_in_progress = 0x80000, // ipc transfer
  31
  32   Thread_drq_wait             = 0x100000, // Thread polls for DRQs
  33   Thread_waiting              = 0x200000, // Thread waits for a lock
  34
  35   Thread_vcpu_enabled         = 0x400000,
  36   Thread_vcpu_fpu_disabled    = 0x1000000,
  37   Thread_ext_vcpu_enabled     = 0x2000000,
  38
  39   // constants for convenience
  40   Thread_ipc_sending_mask    = Thread_send_in_progress |
  41                                Thread_polling,
  42
  43   Thread_ipc_receiving_mask  = Thread_receiving |
  44                                Thread_transfer_in_progress,
  45
  46   Thread_ipc_mask            = Thread_ipc_in_progress |
  47                                Thread_ipc_sending_mask |
  48                                Thread_ipc_receiving_mask,
  49 };