lib/libmthread/global.h

   1 /* EXTERN should be extern, except for the allocate file */
   2 #ifdef ALLOCATE
   3 #undef EXTERN
   4 #define EXTERN
   5 #endif
   6
   7 #include <assert.h>
   8
   9 #define NO_THREADS 4
  10 #define MAX_THREAD_POOL 1024
  11 #define STACKSZ 4096
  12 #define MAIN_THREAD (-1)
  13 #define NO_THREAD (-2)
  14 #define isokthreadid(i) (i == MAIN_THREAD || (i >= 0 && i < no_threads))
  15 #define MTHREAD_INIT_MAGIC 0xca11ab1e
  16 #define MTHREAD_NOT_INUSE  0xdefec7
  17
  18 typedef enum {
  19   MS_CONDITION, MS_DEAD, MS_EXITING, MS_MUTEX, MS_RUNNABLE, MS_NEEDRESET
  20 } mthread_state_t;
  21
  22 struct __mthread_tcb {
  23   mthread_thread_t m_tid;               /* My own ID */
  24   mthread_state_t m_state;              /* Thread state */
  25   struct __mthread_attr m_attr;         /* Thread attributes */
  26   struct __mthread_cond *m_cond;        /* Condition variable that this thread
  27                                          * might be blocking on */
  28   void *(*m_proc)(void *);              /* Procedure to run */
  29   void *m_arg;                          /* Argument passed to procedure */
  30   void *m_result;                       /* Result after procedure returns */
  31   mthread_cond_t m_exited;              /* Condition variable signaling this
  32                                          * thread has ended */
  33   mthread_mutex_t m_exitm;              /* Mutex to accompany exit condition */
  34   ucontext_t m_context;                 /* Thread machine context */
  35   struct __mthread_tcb *m_next;         /* Next thread in linked list */
  36 };
  37 typedef struct __mthread_tcb mthread_tcb_t;
  38
  39 EXTERN mthread_thread_t current_thread;
  40 EXTERN mthread_queue_t free_threads;
  41 EXTERN mthread_queue_t run_queue;               /* FIFO of runnable threads */
  42 EXTERN mthread_tcb_t **threads;
  43 EXTERN mthread_tcb_t mainthread;
  44 EXTERN int no_threads;
  45 EXTERN int used_threads;
  46 EXTERN int need_reset;
  47 EXTERN int running_main_thread;
  48