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 #include <sys/types.h>
   9 #include <sys/signal.h>
  10
  11 #define MTHREAD_RND_SCHED       0       /* Enable/disable random scheduling */
  12 #define NO_THREADS 4
  13 #define MAX_THREAD_POOL 1024
  14 #define STACKSZ 4096
  15 #define MAIN_THREAD (-1)
  16 #define NO_THREAD (-2)
  17 #define isokthreadid(i) (i == MAIN_THREAD || (i >= 0 && i < no_threads))
  18 #define MTHREAD_INIT_MAGIC 0xca11ab1e
  19 #define MTHREAD_NOT_INUSE  0xdefec7
  20
  21 typedef enum {
  22   MS_CONDITION, MS_DEAD, MS_EXITING, MS_MUTEX, MS_RUNNABLE, MS_NEEDRESET
  23 } mthread_state_t;
  24
  25 struct __mthread_tcb {
  26   mthread_thread_t m_tid;               /* My own ID */
  27   mthread_state_t m_state;              /* Thread state */
  28   struct __mthread_attr m_attr;         /* Thread attributes */
  29   struct __mthread_cond *m_cond;        /* Condition variable that this thread
  30                                          * might be blocking on */
  31   void *(*m_proc)(void *);              /* Procedure to run */
  32   void *m_arg;                          /* Argument passed to procedure */
  33   void *m_result;                       /* Result after procedure returns */
  34   mthread_cond_t m_exited;              /* Condition variable signaling this
  35                                          * thread has ended */
  36   mthread_mutex_t m_exitm;              /* Mutex to accompany exit condition */
  37   ucontext_t m_context;                 /* Thread machine context */
  38   struct __mthread_tcb *m_next;         /* Next thread in linked list */
  39 };
  40 typedef struct __mthread_tcb mthread_tcb_t;
  41
  42 EXTERN mthread_thread_t current_thread;
  43 EXTERN mthread_queue_t free_threads;
  44 EXTERN mthread_queue_t run_queue;               /* FIFO of runnable threads */
  45 EXTERN mthread_tcb_t **threads;
  46 EXTERN mthread_tcb_t mainthread;
  47 EXTERN int no_threads;
  48 EXTERN int used_threads;
  49 EXTERN int need_reset;
  50 EXTERN int running_main_thread;
  51