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/*
* Mach Operating System
* Copyright (c) 1989 Carnegie-Mellon University
* All rights reserved. The CMU software License Agreement specifies
* the terms and conditions for use and redistribution.
*/
/*
* HISTORY
* 08-Mar-90 Avadis Tevanian, Jr. (avie) at NeXT
* Added errno field to cproc structure.
*
* $Log: cthread_internals.h,v $
* Revision 1.5 89/06/21 13:03:01 mbj
* Removed the old (! IPC_WAIT) form of condition waiting/signalling.
*
* Revision 1.4 89/05/19 13:02:58 mbj
* Add cproc flags.
*
* Revision 1.3 89/05/05 18:48:17 mrt
* Cleanup for Mach 2.5
*
* 24-Mar-89 Michael Jones (mbj) at Carnegie-Mellon University
* Implement fork() for multi-threaded programs.
* Made MTASK version work correctly again.
*/
/*
* cthread_internals.h - by Eric Cooper
*
* Private definitions for the C Threads implementation.
*
* The cproc structure is used for different implementations
* of the basic schedulable units that execute cthreads.
*
* The cproc implementation is determined by defining exactly
* one of the following options:
*
* MTHREAD MACH threads; single address space,
* kernel-mode preemptive scheduling
*
* COROUTINE coroutines; single address space,
* user-mode non-preemptive scheduling
*
* MTASK MACH tasks; multiple address spaces,
* shared memory for global data,
* kernel-mode preemptive scheduling
*/
#include "options.h"
/*
* Low-level thread implementation.
* This structure must agree with struct ur_cthread in cthreads.h
*/
typedef struct cproc {
struct cproc *next; /* for lock, condition, and ready queues */
cthread_t incarnation; /* for cthread_self() */
int state;
port_t reply_port; /* for mig_get_reply_port() */
#if COROUTINE
int context;
#endif COROUTINE
#if MTHREAD
port_t wait_port;
#endif MTHREAD
#if MTHREAD || MTASK
int thread_id;
#endif MTHREAD || MTASK
struct cproc *link; /* for finding cproc_self() when MTASK;
also so all cprocs can be found
after a fork() */
#if MTHREAD || COROUTINE
int flags;
#endif MTHREAD || COROUTINE
unsigned int stack_base;
unsigned int stack_size;
#if NeXT
int error;
#endif NeXT
} *cproc_t;
#define NO_CPROC ((cproc_t) 0)
#define cproc_self() ((cproc_t) ur_cthread_self())
/*
* Possible cproc states.
*/
#define CPROC_RUNNING 0
#define CPROC_SPINNING 1
#define CPROC_BLOCKED 2
#if MTHREAD || COROUTINE
/*
* The cproc flag bits.
*/
#define CPROC_INITIAL_STACK 0x1
#endif MTHREAD || COROUTINE
/*
* C Threads imports:
*/
#ifdef __STRICT_BSD__
extern char *malloc();
#endif __STRICT_BSD__
/*
* C library imports:
*/
#ifdef __STRICT_BSD__
extern exit();
#else
#include <stdlib.h>
#endif __STRICT_BSD__
/*
* Macro for MACH kernel calls.
*/
#define MACH_CALL(expr, ret) if (((ret) = (expr)) != KERN_SUCCESS) { \
mach_error("expr", (ret)); \
ASSERT(SHOULDNT_HAPPEN); \
exit(1); \
} else
/*
* Debugging support.
*/
#ifdef DEBUG
#define private
#define TRACE(x) if (cthread_debug) x ; else
extern int cthread_debug;
/*
* C library imports:
*/
extern printf(), fprintf(), abort();
#else DEBUG
#define private static
#define TRACE(x)
#endif DEBUG
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