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/*

 * (c) Copyright 1990-1996 OPEN SOFTWARE FOUNDATION, INC.

 * (c) Copyright 1990-1996 HEWLETT-PACKARD COMPANY

 * (c) Copyright 1990-1996 DIGITAL EQUIPMENT CORPORATION

 * (c) Copyright 1991, 1992 Siemens-Nixdorf Information Systems

 * To anyone who acknowledges that this file is provided "AS IS" without

 * any express or implied warranty: permission to use, copy, modify, and

 * distribute this file for any purpose is hereby granted without fee,

 * provided that the above copyright notices and this notice appears in

 * all source code copies, and that none of the names listed above be used

 * in advertising or publicity pertaining to distribution of the software

 * without specific, written prior permission.  None of these organizations

 * makes any representations about the suitability of this software for

 * any purpose.

 */

/*

 *      TCB-related type definitions.

 */

#ifndef CMA_TCB_DEFS

#define CMA_TCB_DEFS

/*

 *  INCLUDE FILES

 */

# if !_CMA_THREAD_SYNC_IO_

#  include <cma_thread_io.h>

# endif

#include <cma.h>

#include <cma_debug_client.h>

#include <cma_attr.h>

#include <cma_defs.h>

#include <cma_handle.h>

#include <cma_queue.h>

#if _CMA_OS_ == _CMA__UNIX

# if defined(SNI_DCOSX)

#   include <sys/ucontext.h>

# endif

# include <signal.h>

#endif

#include <cma_sched.h>

/*

 * CONSTANTS AND MACROS

 */

#if _CMA_PLATFORM_ == _CMA__IBMR2_UNIX

# define cma__c_ibmr2_ctx_stack_size    2048

# define cma__c_ibmr2_ctx_stack_top     (cma__c_ibmr2_ctx_stack_size - 1)

#endif

/*

 * TYPEDEFS

 */

#ifndef __STDC__

# if _CMA_HARDWARE_ != _CMA__HPPA

struct CMA__T_SEMAPHORE;

# endif

struct CMA__T_INT_CV;

struct CMA__T_INT_MUTEX;

struct CMA__T_INT_TCB;

#endif

typedef cma_t_address           *cma__t_context_list;

typedef struct CMA__T_TCB_PAD {

    /*

     * Adjust to align the tcb prolog at byte 32.

     * 12 bytes are required as object header is currently

     * 20 bytes long.

     */

    cma_t_integer       pad1;           /* pad bytes */

    cma_t_integer       pad2;           /* pad bytes */

    cma_t_integer       pad3;           /* pad bytes */

    } cma__t_tcb_pad;

#if (_CMA_OS_ == _CMA__UNIX) && !_CMA_THREAD_SYNC_IO_

typedef struct CMA__T_TCB_SELECT {

    cma__t_queue        queue;

#if (_CMA_UNIX_TYPE !=  _CMA__SVR4)

        cma__t_file_mask    *rfds;

        cma__t_file_mask    *wfds;

        cma__t_file_mask    *efds;

#else

        cma__t_poll_info        poll_info;

#endif /* (_CMA_UNIX_TYPE !=  _CMA__SVR4) */

    cma_t_integer       nfound;

    } cma__t_tcb_select;

#endif

typedef struct CMA__T_TCB_TIME {

    cma__t_queue        queue;          /* must be first entry! */

    cma_t_integer       mode;

    struct CMA__T_SEMAPHORE *semaphore; /* used for timed semaphores */

    cma_t_date_time     wakeup_time;

    cma_t_integer       quanta_remaining;

    } cma__t_tcb_time;

typedef enum CMA__T_DEBEVT {

        cma__c_debevt_activating = 1,   /* First transition to running */

        cma__c_debevt_running = 2,      /* Any transition to running */

        cma__c_debevt_preempting = 3,   /* Preemted (replaced) another thread */

        cma__c_debevt_blocking = 4,     /* Any transition to blocked */

        cma__c_debevt_terminating = 5,  /* Final state transition */

        cma__c_debevt_term_alert = 6,   /* Terminated due to alert/cancel */

        cma__c_debevt_term_exc = 7,     /* Terminated due to exception */

        cma__c_debevt_exc_handled = 8   /* Exception is being handled */

        } cma__t_debevt;

#define cma__c_debevt__first ((cma_t_integer)cma__c_debevt_activating)

#define cma__c_debevt__last  ((cma_t_integer)cma__c_debevt_exc_handled)

#define cma__c_debevt__dim (cma__c_debevt__last + 1)

/*

 * Type defining thread substate, which is used by the debugger.

 * If the state is blocked, substate indicates WHY the thread is blocked.

 */

typedef enum CMA__T_SUBSTATE {

    cma__c_substa_normal = 0,

    cma__c_substa_mutex = 1,

    cma__c_substa_cv = 2,

    cma__c_substa_timed_cv = 3,

    cma__c_substa_term_alt = 4,

    cma__c_substa_term_exc = 5,

    cma__c_substa_delay =6,

    cma__c_substa_not_yet_run = 7

    } cma__t_substate;

#define cma__c_substa__first ((cma_t_integer)cma__c_substa_normal)

#define cma__c_substa__last  ((cma_t_integer)cma__c_substa_not_yet_run)

#define cma__c_substa__dim (cma__c_substa__last + 1)

/*

 * Per-thread state for the debugger

 */

typedef struct CMA__T_TCB_DEBUG {

    cma_t_boolean       on_hold;        /* Thread was put on hold by debugger */

    cma_t_boolean       activated;      /* Activation event was reported */

    cma_t_boolean       did_preempt;    /* Thread preempted prior one */

    cma_t_address       start_pc;       /* Start routine address */

    cma_t_address       object_addr;    /* Addr of thread object */

    cma__t_substate     substate;       /* Reason blocked, terminated, etc.*/

    cma_t_boolean       notify_debugger;/* Notify debugger thread is running */

    cma_t_address       SPARE2;         /* SPARE */

    cma_t_address       SPARE3;         /* SPARE */

    struct CMA__T_INT_TCB

                        *preempted_tcb; /* TCB of thread that got preempted */

    cma_t_boolean       flags[cma__c_debevt__dim];

                                        /* Events enabled for this thread */

    } cma__t_tcb_debug;

typedef struct CMA__T_TCB_SCHED {

    cma_t_integer       adj_time;       /* Abs. time in ticks of last prio adj */

    cma_t_integer       tot_time;       /* Weighted ave in ticks (scaled) */

    cma_t_integer       time_stamp;     /* Abs. time in ticks of last update */

    cma_t_integer       cpu_time;       /* Weighted average in ticks */

    cma_t_integer       cpu_ticks;      /* # of ticks while comp. (scaled) */

    cma_t_integer       q_num;          /* Number of last ready queue on */

    cma_t_priority      priority;       /* Thread priority */

    cma_t_sched_policy  policy;         /* Scheduling policy of thread */

    cma_t_boolean       rtb;            /* "Run 'Till Block" scheduling */

    cma_t_boolean       spp;            /* "Strict Priority Preemption" sched */

    cma_t_boolean       fixed_prio;     /* Fixed priority */

    cma__t_sched_class  class;          /* Scheduling class */

    struct CMA__T_VP    *processor;     /* Current processor (if running) */

    } cma__t_tcb_sched;

typedef struct CMA__T_INT_ALERT {

    cma_t_boolean       pending : 1;    /* alert_pending bit */

    cma_t_boolean       g_enable : 1;   /* general delivery state */

    cma_t_boolean       a_enable : 1;   /* asynchronous delivery state */

    cma_t_integer       spare : 29;     /* Pad to longword */

    cma_t_natural       count;          /* Alert scope nesting count */

    } cma__t_int_alert;

typedef enum CMA__T_STATE {

    cma__c_state_running = 0,            /* For consistency with initial TCB */

    cma__c_state_ready  = 1,

    cma__c_state_blocked = 2,

    cma__c_state_terminated = 3

    } cma__t_state;

#define cma__c_state__first ((cma_t_integer)cma__c_state_running)

#define cma__c_state__last  ((cma_t_integer)cma__c_state_terminated)

#define cma__c_state__dim (cma__c_state__last + 1)

typedef enum CMA__T_THKIND {

    cma__c_thkind_initial = 0,           /* Initial thread */

    cma__c_thkind_normal = 1,           /* Normal thread */

    cma__c_thkind_null  = 2             /* A null thread */

    } cma__t_thkind;

#define cma__c_thkind__first ((cma_t_integer)cma__c_thkind_initial)

#define cma__c_thkind__last  ((cma_t_integer)cma__c_thkind_null)

#define cma__c_thkind__dim (cma__c_thkind__last + 1)

typedef enum CMA__T_SYSCALL_STATE {

        cma__c_syscall_ok = 1,                      /* syscall was not interrupted */

        cma__c_syscall_intintrpt = 1,       /* syscall was interrupted by VTALRM */

        cma__c_syscall_extintrpt = 2        /* syscall was interrupted by external signal */

        } cma__t_syscall_state;

typedef struct CMA__T_INT_TCB {

    /*

     * Fixed part of TCB.

     *   Modifications to the following three fields must be coordinated.

     *   The object header must always be first, and the prolog must always

     *   remain at the same offset (32) for all time. Thus the object header

     *   must never grow beyond a maximum of 32 bytes.

     */

    cma__t_object       header;         /* Common object header */

    cma__t_tcb_pad      pad1;           /* Pad required to align prolog */

    cma_t_tcb_prolog    prolog;         /* Standard prolog for tasks, threads */

    /*

     * Floating part of TCB (fields here on are free to be moved and resized).

     */

    cma__t_queue        threads;        /* List of all known threads */

    cma__t_int_attr     *attributes;    /* Backpointer to attr obj */

    cma__t_state        state;          /* Current state of thread */

    cma__t_thkind       kind;           /* Which kind of thread */

    struct CMA__T_INT_MUTEX

                        *mutex;         /* Mutex to control TCB access */

    struct CMA__T_INT_CV

                        *term_cv;       /* CV for join */

    struct CMA__T_INT_MUTEX

                        *tswait_mutex;  /* Mutex for thread-synchronous waits */

    struct CMA__T_INT_CV

                        *tswait_cv;     /* CV for thread-synchronous waits */

    cma_t_start_routine start_code;     /* Address of start routine */

    cma_t_address       start_arg;      /* Argument to pass to start_code */

    cma__t_queue        stack;          /* Queue header for stack descr. */

    cma_t_natural       context_count;  /* Size of context array */

    cma__t_context_list contexts;       /* Context value array pointer */

    cma_t_exit_status   exit_status;    /* Exit status of thread */

    cma_t_address       return_value;   /* Thread's return value */

    cma__t_async_ctx    async_ctx;      /* Asynchronous context switch info */

    cma__t_static_ctx   static_ctx;     /* Static context switch information */

    cma_t_integer       event_status;   /* Status of semaphore operation */

    cma__t_tcb_time     timer;          /* Time info for dispatcher */

    cma__t_tcb_sched    sched;          /* Scheduler info */

    cma__t_tcb_debug    debug;          /* Debugger info */

#if _CMA_OS_ == _CMA__UNIX

# if !_CMA_THREAD_SYNC_IO_

    cma__t_tcb_select   select;         /* Select info for timed selects */

# endif

    struct sigaction    sigaction_data[NSIG];

#endif

    cma_t_natural       syscall_state; /* set if one of the cma wrapped syscalls was interrupted. */

    cma_t_boolean       detached;       /* Set if already detached */

    cma_t_boolean       terminated;     /* Set if terminated */

    cma_t_integer       joiners;        /* Count of joiners, for zombie frees */

    cma__t_int_alert    alert;          /* Current alert state info */

    struct CMA__T_INT_CV

                        *wait_cv;       /* CV thread is currently waiting on */

    struct CMA__T_INT_MUTEX

                        *wait_mutex;    /* Mutex thread is waiting on */

    struct EXC_CONTEXT_T

                        *exc_stack;     /* Top of exception stack */

#if _CMA_PLATFORM_ == _CMA__IBMR2_UNIX

    char                ctx_stack[cma__c_ibmr2_ctx_stack_size];

#endif

    cma_t_integer       thd_errno;      /* Per-thread errno value */

#if _CMA_OS_ == _CMA__VMS

    cma_t_integer       thd_vmserrno;   /* Per-thread VMS errno value */

#endif

    } cma__t_int_tcb;

#endif