/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * 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 the Initial Developer are Copyright (C) 1998-2000 * the Initial Developer. All Rights Reserved. * * Contributor(s): * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ #ifndef nspr_os2_defs_h___ #define nspr_os2_defs_h___ #ifndef NO_LONG_LONG #define INCL_LONGLONG #endif #define INCL_DOS #define INCL_DOSPROCESS #define INCL_DOSERRORS #define INCL_WIN #define INCL_WPS #include #include #include "prio.h" #include #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; union { FILEFINDBUF3 small; FILEFINDBUF3L large; } 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 --- */ /* 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) #ifdef XP_OS2_VACPP #define _MD_SOCKETPAIR(s, type, proto, sv) -1 #else #define _MD_SOCKETPAIR (_PR_MD_SOCKETPAIR) #endif #define _MD_GETSOCKNAME (_PR_MD_GETSOCKNAME) #define _MD_GETPEERNAME (_PR_MD_GETPEERNAME) #define _MD_GETSOCKOPT (_PR_MD_GETSOCKOPT) #define _MD_SETSOCKOPT (_PR_MD_SETSOCKOPT) #define _MD_FSYNC _PR_MD_FSYNC #define _MD_SET_FD_INHERITABLE (_PR_MD_SET_FD_INHERITABLE) #ifdef _PR_HAVE_ATOMIC_OPS #define _MD_INIT_ATOMIC() #define _MD_ATOMIC_INCREMENT _PR_MD_ATOMIC_INCREMENT #define _MD_ATOMIC_ADD _PR_MD_ATOMIC_ADD #define _MD_ATOMIC_DECREMENT _PR_MD_ATOMIC_DECREMENT #define _MD_ATOMIC_SET _PR_MD_ATOMIC_SET #endif #define _MD_INIT_IO (_PR_MD_INIT_IO) #define _MD_PR_POLL (_PR_MD_PR_POLL) #define _MD_SOCKET (_PR_MD_SOCKET) extern PRInt32 _MD_SocketAvailable(PRFileDesc *fd); #define _MD_SOCKETAVAILABLE _MD_SocketAvailable #define _MD_PIPEAVAILABLE _MD_SocketAvailable #define _MD_CONNECT (_PR_MD_CONNECT) extern PRInt32 _MD_Accept(PRFileDesc *fd, PRNetAddr *raddr, PRUint32 *rlen, PRIntervalTime timeout); #define _MD_ACCEPT _MD_Accept #define _MD_BIND (_PR_MD_BIND) #define _MD_RECV (_PR_MD_RECV) #define _MD_SEND (_PR_MD_SEND) /* --- Scheduler stuff --- */ /* #define _MD_PAUSE_CPU _PR_MD_PAUSE_CPU */ #define _MD_PAUSE_CPU /* --- DIR stuff --- */ #define PR_DIRECTORY_SEPARATOR '\\' #define PR_DIRECTORY_SEPARATOR_STR "\\" #define PR_PATH_SEPARATOR ';' #define PR_PATH_SEPARATOR_STR ";" #define _MD_ERRNO() errno #define _MD_OPEN_DIR (_PR_MD_OPEN_DIR) #define _MD_CLOSE_DIR (_PR_MD_CLOSE_DIR) #define _MD_READ_DIR (_PR_MD_READ_DIR) /* --- Segment stuff --- */ #define _MD_INIT_SEGS() #define _MD_ALLOC_SEGMENT(seg, size, vaddr) 0 #define _MD_FREE_SEGMENT(seg) /* --- Environment Stuff --- */ #define _MD_GET_ENV (_PR_MD_GET_ENV) #define _MD_PUT_ENV (_PR_MD_PUT_ENV) /* --- Threading Stuff --- */ #define _MD_DEFAULT_STACK_SIZE 65536L #define _MD_INIT_THREAD (_PR_MD_INIT_THREAD) #define _MD_INIT_ATTACHED_THREAD (_PR_MD_INIT_THREAD) #define _MD_CREATE_THREAD (_PR_MD_CREATE_THREAD) #define _MD_YIELD (_PR_MD_YIELD) #define _MD_SET_PRIORITY (_PR_MD_SET_PRIORITY) #define _MD_CLEAN_THREAD (_PR_MD_CLEAN_THREAD) #define _MD_SETTHREADAFFINITYMASK (_PR_MD_SETTHREADAFFINITYMASK) #define _MD_GETTHREADAFFINITYMASK (_PR_MD_GETTHREADAFFINITYMASK) #define _MD_EXIT_THREAD (_PR_MD_EXIT_THREAD) #define _MD_SUSPEND_THREAD (_PR_MD_SUSPEND_THREAD) #define _MD_RESUME_THREAD (_PR_MD_RESUME_THREAD) #define _MD_SUSPEND_CPU (_PR_MD_SUSPEND_CPU) #define _MD_RESUME_CPU (_PR_MD_RESUME_CPU) #define _MD_WAKEUP_CPUS (_PR_MD_WAKEUP_CPUS) #define _MD_BEGIN_SUSPEND_ALL() #define _MD_BEGIN_RESUME_ALL() #define _MD_END_SUSPEND_ALL() #define _MD_END_RESUME_ALL() /* --- Lock stuff --- */ #define _PR_LOCK _MD_LOCK #define _PR_UNLOCK _MD_UNLOCK #ifdef USE_RAMSEM #define _MD_NEW_LOCK (_PR_MD_NEW_LOCK) #define _MD_FREE_LOCK(lock) (DosCloseEventSem(((PRAMSEM)(&((lock)->mutex)))->hevSem)) #define _MD_LOCK(lock) (SemRequest486(&((lock)->mutex), -1)) #define _MD_TEST_AND_LOCK(lock) (SemRequest486(&((lock)->mutex), -1),0) #define _MD_UNLOCK(lock) \ PR_BEGIN_MACRO \ if (0 != (lock)->notified.length) { \ md_UnlockAndPostNotifies((lock), NULL, NULL); \ } else { \ SemReleasex86( &(lock)->mutex, 0 ); \ } \ PR_END_MACRO #else #define _MD_NEW_LOCK (_PR_MD_NEW_LOCK) #define _MD_FREE_LOCK(lock) (DosCloseMutexSem((lock)->mutex)) #define _MD_LOCK(lock) (DosRequestMutexSem((lock)->mutex, SEM_INDEFINITE_WAIT)) #define _MD_TEST_AND_LOCK(lock) (DosRequestMutexSem((lock)->mutex, SEM_INDEFINITE_WAIT),0) #define _MD_UNLOCK(lock) \ PR_BEGIN_MACRO \ if (0 != (lock)->notified.length) { \ md_UnlockAndPostNotifies((lock), NULL, NULL); \ } else { \ DosReleaseMutexSem((lock)->mutex); \ } \ PR_END_MACRO #endif /* --- lock and cv waiting --- */ #define _MD_WAIT (_PR_MD_WAIT) #define _MD_WAKEUP_WAITER (_PR_MD_WAKEUP_WAITER) /* --- CVar ------------------- */ #define _MD_WAIT_CV (_PR_MD_WAIT_CV) #define _MD_NEW_CV (_PR_MD_NEW_CV) #define _MD_FREE_CV (_PR_MD_FREE_CV) #define _MD_NOTIFY_CV (_PR_MD_NOTIFY_CV ) #define _MD_NOTIFYALL_CV (_PR_MD_NOTIFYALL_CV) /* XXXMB- the IOQ stuff is certainly not working correctly yet. */ /* extern struct _MDLock _pr_ioq_lock; */ #define _MD_IOQ_LOCK() #define _MD_IOQ_UNLOCK() /* --- Initialization stuff --- */ #define _MD_START_INTERRUPTS() #define _MD_STOP_INTERRUPTS() #define _MD_DISABLE_CLOCK_INTERRUPTS() #define _MD_ENABLE_CLOCK_INTERRUPTS() #define _MD_BLOCK_CLOCK_INTERRUPTS() #define _MD_UNBLOCK_CLOCK_INTERRUPTS() #define _MD_EARLY_INIT (_PR_MD_EARLY_INIT) #define _MD_FINAL_INIT() #define _MD_INIT_CPUS() #define _MD_INIT_RUNNING_CPU(cpu) struct PRProcess; struct PRProcessAttr; #define _MD_CREATE_PROCESS _PR_CreateOS2Process extern struct PRProcess * _PR_CreateOS2Process( const char *path, char *const *argv, char *const *envp, const struct PRProcessAttr *attr ); #define _MD_DETACH_PROCESS _PR_DetachOS2Process extern PRStatus _PR_DetachOS2Process(struct PRProcess *process); /* --- Wait for a child process to terminate --- */ #define _MD_WAIT_PROCESS _PR_WaitOS2Process extern PRStatus _PR_WaitOS2Process(struct PRProcess *process, PRInt32 *exitCode); #define _MD_KILL_PROCESS _PR_KillOS2Process extern PRStatus _PR_KillOS2Process(struct PRProcess *process); #define _MD_CLEANUP_BEFORE_EXIT() #define _MD_EXIT (_PR_MD_EXIT) #define _MD_INIT_CONTEXT(_thread, _sp, _main, status) \ PR_BEGIN_MACRO \ *status = PR_TRUE; \ PR_END_MACRO #define _MD_SWITCH_CONTEXT #define _MD_RESTORE_CONTEXT /* --- Intervals --- */ #define _MD_INTERVAL_INIT (_PR_MD_INTERVAL_INIT) #define _MD_GET_INTERVAL (_PR_MD_GET_INTERVAL) #define _MD_INTERVAL_PER_SEC (_PR_MD_INTERVAL_PER_SEC) #define _MD_INTERVAL_PER_MILLISEC() (_PR_MD_INTERVAL_PER_SEC() / 1000) #define _MD_INTERVAL_PER_MICROSEC() (_PR_MD_INTERVAL_PER_SEC() / 1000000) /* --- Native-Thread Specific Definitions ------------------------------- */ typedef struct __NSPR_TLS { struct PRThread *_pr_thread_last_run; struct PRThread *_pr_currentThread; struct _PRCPU *_pr_currentCPU; } _NSPR_TLS; extern _NSPR_TLS* pThreadLocalStorage; NSPR_API(void) _PR_MD_ENSURE_TLS(void); #define _MD_GET_ATTACHED_THREAD() pThreadLocalStorage->_pr_currentThread extern struct PRThread * _MD_CURRENT_THREAD(void); #define _MD_SET_CURRENT_THREAD(_thread) _PR_MD_ENSURE_TLS(); pThreadLocalStorage->_pr_currentThread = (_thread) #define _MD_LAST_THREAD() pThreadLocalStorage->_pr_thread_last_run #define _MD_SET_LAST_THREAD(_thread) _PR_MD_ENSURE_TLS(); pThreadLocalStorage->_pr_thread_last_run = (_thread) #define _MD_CURRENT_CPU() pThreadLocalStorage->_pr_currentCPU #define _MD_SET_CURRENT_CPU(_cpu) _PR_MD_ENSURE_TLS(); pThreadLocalStorage->_pr_currentCPU = (_cpu) /* lth. #define _MD_SET_INTSOFF(_val) (_pr_ints_off = (_val)) */ /* lth. #define _MD_GET_INTSOFF() _pr_ints_off */ /* lth. #define _MD_INCREMENT_INTSOFF() (_pr_ints_off++) */ /* lth. #define _MD_DECREMENT_INTSOFF() (_pr_ints_off--) */ /* --- Scheduler stuff --- */ #define LOCK_SCHEDULER() 0 #define UNLOCK_SCHEDULER() 0 #define _PR_LockSched() 0 #define _PR_UnlockSched() 0 /* --- Initialization stuff --- */ #define _MD_INIT_LOCKS() /* --- Stack stuff --- */ #define _MD_INIT_STACK(stack, redzone) #define _MD_CLEAR_STACK(stack) /* --- Memory-mapped files stuff --- not implemented on OS/2 */ struct _MDFileMap { PRInt8 unused; }; extern PRStatus _MD_CreateFileMap(struct PRFileMap *fmap, PRInt64 size); #define _MD_CREATE_FILE_MAP _MD_CreateFileMap extern PRInt32 _MD_GetMemMapAlignment(void); #define _MD_GET_MEM_MAP_ALIGNMENT _MD_GetMemMapAlignment extern void * _MD_MemMap(struct PRFileMap *fmap, PRInt64 offset, PRUint32 len); #define _MD_MEM_MAP _MD_MemMap extern PRStatus _MD_MemUnmap(void *addr, PRUint32 size); #define _MD_MEM_UNMAP _MD_MemUnmap extern PRStatus _MD_CloseFileMap(struct PRFileMap *fmap); #define _MD_CLOSE_FILE_MAP _MD_CloseFileMap /* Some stuff for setting up thread contexts */ typedef ULONG DWORD, *PDWORD; /* The following definitions and two structures are new in OS/2 Warp 4.0. */ #ifndef CONTEXT_CONTROL #define CONTEXT_CONTROL 0x00000001 #define CONTEXT_INTEGER 0x00000002 #define CONTEXT_SEGMENTS 0x00000004 #define CONTEXT_FLOATING_POINT 0x00000008 #define CONTEXT_FULL 0x0000000F #pragma pack(2) typedef struct _FPREG { ULONG losig; /* Low 32-bits of the significand. */ ULONG hisig; /* High 32-bits of the significand. */ USHORT signexp; /* Sign and exponent. */ } FPREG; typedef struct _CONTEXTRECORD { ULONG ContextFlags; ULONG ctx_env[7]; FPREG ctx_stack[8]; ULONG ctx_SegGs; /* GS register. */ ULONG ctx_SegFs; /* FS register. */ ULONG ctx_SegEs; /* ES register. */ ULONG ctx_SegDs; /* DS register. */ ULONG ctx_RegEdi; /* EDI register. */ ULONG ctx_RegEsi; /* ESI register. */ ULONG ctx_RegEax; /* EAX register. */ ULONG ctx_RegEbx; /* EBX register. */ ULONG ctx_RegEcx; /* ECX register. */ ULONG ctx_RegEdx; /* EDX register. */ ULONG ctx_RegEbp; /* EBP register. */ ULONG ctx_RegEip; /* EIP register. */ ULONG ctx_SegCs; /* CS register. */ ULONG ctx_EFlags; /* EFLAGS register. */ ULONG ctx_RegEsp; /* ESP register. */ ULONG ctx_SegSs; /* SS register. */ } CONTEXTRECORD, *PCONTEXTRECORD; #pragma pack() #endif extern APIRET (* APIENTRY QueryThreadContext)(TID, ULONG, PCONTEXTRECORD); /* #define _pr_tid (((PTIB2)_getTIBvalue(offsetof(TIB, tib_ptib2)))->tib2_ultid) #define _pr_current_Thread (_system_tls[_pr_tid-1].__pr_current_thread) */ /* Some simple mappings of Windows API's to OS/2 API's to make our lives a * little bit easier. Only add one here if it is a DIRECT mapping. We are * not emulating anything. Just mapping. */ #define FreeLibrary(x) DosFreeModule((HMODULE)x) #define OutputDebugString(x) extern int _MD_os2_get_nonblocking_connect_error(int osfd); #endif /* nspr_os2_defs_h___ */