_os2.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is the Netscape Portable Runtime (NSPR).
 * 
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are 
 * Copyright (C) 1998-2000 Netscape Communications Corporation.  All
 * Rights Reserved.
 * 
 * Contributor(s):
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL"), in which case the provisions of the GPL are applicable 
 * instead of those above.  If you wish to allow use of your 
 * version of this file only under the terms of the GPL and not to
 * allow others to use your version of this file under the MPL,
 * indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by
 * the GPL.  If you do not delete the provisions above, a recipient
 * may use your version of this file under either the MPL or the
 * GPL.
 */

#ifndef nspr_os2_defs_h___
#define nspr_os2_defs_h___

#define INCL_DOS
#define INCL_DOSPROCESS
#define INCL_DOSERRORS
#define INCL_WIN
#define INCL_WPS
#include <os2.h>
#include <sys/select.h>

#include "prio.h"

#include <errno.h>

#ifdef XP_OS2_VACPP
/* TODO RAMSEMs need to be written for GCC/EMX */
#define USE_RAMSEM
#endif

#ifdef USE_RAMSEM
#pragma pack(4)

#pragma pack(2)
typedef struct _RAMSEM
{
   ULONG   ulTIDPID;
   ULONG   hevSem;
   ULONG   cLocks;
   USHORT  cWaiting;
   USHORT  cPosts;
} RAMSEM, *PRAMSEM;

typedef struct _CRITICAL_SECTION
{
    ULONG ulReserved[4]; /* Same size as RAMSEM */
} CRITICAL_SECTION, *PCRITICAL_SECTION, *LPCRITICAL_SECTION;
#pragma pack(4)

APIRET _Optlink SemRequest486(PRAMSEM, ULONG);
APIRET _Optlink SemReleasex86(PRAMSEM, ULONG);
#endif

/*
 * Internal configuration macros
 */

#define PR_LINKER_ARCH      "os2"
#define _PR_SI_SYSNAME        "OS2"
#define _PR_SI_ARCHITECTURE   "x86"    /* XXXMB hardcode for now */

#define HAVE_DLL
#define _PR_GLOBAL_THREADS_ONLY
#undef  HAVE_THREAD_AFFINITY
#define _PR_HAVE_THREADSAFE_GETHOST
#define _PR_HAVE_ATOMIC_OPS

#define HANDLE unsigned long
#define HINSTANCE HMODULE

/* --- Common User-Thread/Native-Thread Definitions --------------------- */

/* --- Globals --- */
extern struct PRLock                      *_pr_schedLock;

/* --- Typedefs --- */
typedef void (*FiberFunc)(void *);

#define PR_NUM_GCREGS           8
typedef PRInt32	                PR_CONTEXT_TYPE[PR_NUM_GCREGS];
#define GC_VMBASE               0x40000000
#define GC_VMLIMIT              0x00FFFFFF
typedef int (*FARPROC)();

#define _MD_MAGIC_THREAD	0x22222222
#define _MD_MAGIC_THREADSTACK	0x33333333
#define _MD_MAGIC_SEGMENT	0x44444444
#define _MD_MAGIC_DIR		0x55555555
#define _MD_MAGIC_CV        0x66666666

struct _MDSemaphore {
   HEV sem;
};

struct _MDCPU {
    int              unused;
}; 

struct _MDThread {
    HEV              blocked_sema;      /* Threads block on this when waiting
                                         * for IO or CondVar.
                                         */
    PRBool           inCVWaitQueue;     /* PR_TRUE if the thread is in the
                                         * wait queue of some cond var.
                                         * PR_FALSE otherwise.  */
    TID              handle;            /* OS/2 thread handle */
    void            *sp;                /* only valid when suspended */
    PRUint32         magic;             /* for debugging */
    PR_CONTEXT_TYPE  gcContext;         /* Thread context for GC */
    struct PRThread *prev, *next;       /* used by the cvar wait queue to
                                         * chain the PRThread structures
                                         * together */
};

struct _MDThreadStack {
    PRUint32           magic;          /* for debugging */
};

struct _MDSegment {
    PRUint32           magic;          /* for debugging */
};

#undef PROFILE_LOCKS

struct _MDDir {
    HDIR           d_hdl;
    FILEFINDBUF3  d_entry;
    PRBool           firstEntry;     /* Is this the entry returned
                                      * by FindFirstFile()? */
    PRUint32         magic;          /* for debugging */
};

struct _MDCVar {
    PRUint32 magic;
    struct PRThread *waitHead, *waitTail;  /* the wait queue: a doubly-
                                            * linked list of threads
                                            * waiting on this condition
                                            * variable */
    PRIntn nwait;                          /* number of threads in the
                                            * wait queue */
};

#define _MD_CV_NOTIFIED_LENGTH 6
typedef struct _MDNotified _MDNotified;
struct _MDNotified {
    PRIntn length;                     /* # of used entries in this
                                        * structure */
    struct {
        struct _MDCVar *cv;            /* the condition variable notified */
        PRIntn times;                  /* and the number of times notified */
        struct PRThread *notifyHead;   /* list of threads to wake up */
    } cv[_MD_CV_NOTIFIED_LENGTH];
    _MDNotified *link;                 /* link to another of these, or NULL */
};

struct _MDLock {
#ifdef USE_RAMSEM
    CRITICAL_SECTION mutex;            /* this is recursive on NT */
#else
    HMTX mutex;                        /* this is recursive on NT */
#endif

    /*
     * When notifying cvars, there is no point in actually
     * waking up the threads waiting on the cvars until we've
     * released the lock.  So, we temporarily record the cvars.
     * When doing an unlock, we'll then wake up the waiting threads.
     */
    struct _MDNotified notified;     /* array of conditions notified */
#ifdef PROFILE_LOCKS
    PRInt32 hitcount;
    PRInt32 misscount;
#endif
};

struct _MDFileDesc {
    PRInt32 osfd;    /* The osfd can come from one of three spaces:
                      * - For stdin, stdout, and stderr, we are using
                      *   the libc file handle (0, 1, 2), which is an int.
                      * - For files and pipes, we are using OS/2 handles,
                      *   which is a void*.
                      * - For sockets, we are using int
                      */
};

struct _MDProcess {
   PID pid;
};

/* --- Misc stuff --- */
#define _MD_GET_SP(thread)            (thread)->md.gcContext[6]

/* --- IO stuff --- */

#define _MD_OPEN                      (_PR_MD_OPEN)
#define _MD_OPEN_FILE                 (_PR_MD_OPEN)
#define _MD_READ                      (_PR_MD_READ)
#define _MD_WRITE                     (_PR_MD_WRITE)
#define _MD_WRITEV                    (_PR_MD_WRITEV)
#define _MD_LSEEK                     (_PR_MD_LSEEK)
#define _MD_LSEEK64                   (_PR_MD_LSEEK64)
extern PRInt32 _MD_CloseFile(PRInt32 osfd);
#define _MD_CLOSE_FILE                _MD_CloseFile
#define _MD_GETFILEINFO               (_PR_MD_GETFILEINFO)
#define _MD_GETFILEINFO64             (_PR_MD_GETFILEINFO64)
#define _MD_GETOPENFILEINFO           (_PR_MD_GETOPENFILEINFO)
#define _MD_GETOPENFILEINFO64         (_PR_MD_GETOPENFILEINFO64)
#define _MD_STAT                      (_PR_MD_STAT)
#define _MD_RENAME                    (_PR_MD_RENAME)
#define _MD_ACCESS                    (_PR_MD_ACCESS)
#define _MD_DELETE                    (_PR_MD_DELETE)
#define _MD_MKDIR                     (_PR_MD_MKDIR)
#define _MD_MAKE_DIR                  (_PR_MD_MKDIR)
#define _MD_RMDIR                     (_PR_MD_RMDIR)
#define _MD_LOCKFILE                  (_PR_MD_LOCKFILE)
#define _MD_TLOCKFILE                 (_PR_MD_TLOCKFILE)
#define _MD_UNLOCKFILE                (_PR_MD_UNLOCKFILE)

/* --- Socket IO stuff --- */

#define TCPV40HDRS
#define BSD_SELECT

/* The ones that don't map directly may need to be re-visited... */
#ifdef XP_OS2_VACPP
#define EPIPE                     EBADF
#define EIO                       ECONNREFUSED
#endif
#define _MD_EACCES                EACCES
#define _MD_EADDRINUSE            EADDRINUSE
#define _MD_EADDRNOTAVAIL         EADDRNOTAVAIL
#define _MD_EAFNOSUPPORT          EAFNOSUPPORT
#define _MD_EAGAIN                EWOULDBLOCK
#define _MD_EALREADY              EALREADY
#define _MD_EBADF                 EBADF
#define _MD_ECONNREFUSED          ECONNREFUSED
#define _MD_ECONNRESET            ECONNRESET
#define _MD_EFAULT                SOCEFAULT
#define _MD_EINPROGRESS           EINPROGRESS
#define _MD_EINTR                 EINTR
#define _MD_EINVAL                EINVAL
#define _MD_EISCONN               EISCONN
#define _MD_ENETUNREACH           ENETUNREACH
#define _MD_ENOENT                ENOENT
#define _MD_ENOTCONN              ENOTCONN
#define _MD_ENOTSOCK              ENOTSOCK
#define _MD_EOPNOTSUPP            EOPNOTSUPP
#define _MD_EWOULDBLOCK           EWOULDBLOCK
#define _MD_GET_SOCKET_ERROR()    sock_errno()
#ifndef INADDR_LOOPBACK /* For some reason this is not defined in OS2 tcpip */
/*  #define INADDR_LOOPBACK         INADDR_ANY */
#endif  

#define _MD_INIT_FILEDESC(fd)
extern void _MD_MakeNonblock(PRFileDesc *f);
#define _MD_MAKE_NONBLOCK             _MD_MakeNonblock
#define _MD_INIT_FD_INHERITABLE       (_PR_MD_INIT_FD_INHERITABLE)
#define _MD_QUERY_FD_INHERITABLE      (_PR_MD_QUERY_FD_INHERITABLE)
#define _MD_SHUTDOWN                  (_PR_MD_SHUTDOWN)
#define _MD_LISTEN                    _PR_MD_LISTEN
extern PRInt32 _MD_CloseSocket(PRInt32 osfd);
#define _MD_CLOSE_SOCKET              _MD_CloseSocket
#define _MD_SENDTO                    (_PR_MD_SENDTO)
#define _MD_RECVFROM                  (_PR_MD_RECVFROM)
#define _MD_SOCKETPAIR                (_PR_MD_SOCKETPAIR)
#define _MD_GETSOCKNAME               (_PR_MD_GETSOCKNAME)
#define _MD_GETPEERNAME               (_PR_MD_GETPEERNAME)
#define _MD_GETSOCKOPT                (_PR_MD_GETSOCKOPT)