summaryrefslogtreecommitdiffstats
path: root/win/tclWinInt.h
blob: 3b31d8ac112afe4a5b85ad0e564348d1e925be0f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
/*
 * tclWinInt.h --
 *
 *	Declarations of Windows-specific shared variables and procedures.
 *
 * Copyright (c) 1994-1996 Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#ifndef _TCLWININT
#define _TCLWININT

#include "tclInt.h"

#ifdef HAVE_NO_SEH
/*
 * Unlike Borland and Microsoft, we don't register exception handlers by
 * pushing registration records onto the runtime stack. Instead, we register
 * them by creating an TCLEXCEPTION_REGISTRATION within the activation record.
 */

typedef struct TCLEXCEPTION_REGISTRATION {
    struct TCLEXCEPTION_REGISTRATION *link;
    EXCEPTION_DISPOSITION (*handler)(
	    struct _EXCEPTION_RECORD*, void*, struct _CONTEXT*, void*);
    void *ebp;
    void *esp;
    int status;
} TCLEXCEPTION_REGISTRATION;
#endif

/*
 * Windows version dependend functions
 */
typedef struct TclWinProcs {
    BOOL (WINAPI *cancelSynchronousIo)(HANDLE);
} TclWinProcs;

MODULE_SCOPE TclWinProcs tclWinProcs;

/*
 * Declarations of functions that are not accessible by way of the
 * stubs table.
 */

MODULE_SCOPE char	TclWinDriveLetterForVolMountPoint(
			    const WCHAR *mountPoint);
MODULE_SCOPE void	TclWinEncodingsCleanup(void);
MODULE_SCOPE void	TclWinInit(HINSTANCE hInst);
MODULE_SCOPE TclFile	TclWinMakeFile(HANDLE handle);
MODULE_SCOPE Tcl_Channel TclWinOpenConsoleChannel(HANDLE handle,
			    char *channelName, int permissions);
MODULE_SCOPE Tcl_Channel TclWinOpenFileChannel(HANDLE handle, char *channelName,
			    int permissions, int appendMode);
MODULE_SCOPE Tcl_Channel TclWinOpenSerialChannel(HANDLE handle,
			    char *channelName, int permissions);
MODULE_SCOPE HANDLE	TclWinSerialOpen(HANDLE handle, const WCHAR *name,
			    DWORD access);
MODULE_SCOPE int	TclWinSymLinkCopyDirectory(const WCHAR *LinkOriginal,
			    const WCHAR *LinkCopy);
MODULE_SCOPE int	TclWinSymLinkDelete(const WCHAR *LinkOriginal,
			    int linkOnly);
MODULE_SCOPE int        TclWinFileOwned(Tcl_Obj *);

MODULE_SCOPE const char*TclpGetUserName(Tcl_DString *bufferPtr);

/* Needed by tclWinFile.c and tclWinFCmd.c */
#ifndef FILE_ATTRIBUTE_REPARSE_POINT
#define FILE_ATTRIBUTE_REPARSE_POINT 0x00000400
#endif

/*
 *----------------------------------------------------------------------
 * Declarations of helper-workers threaded facilities for a pipe based channel.
 *
 * Corresponding functionality provided in "tclWinPipe.c".
 *----------------------------------------------------------------------
 */

typedef struct TclPipeThreadInfo {
    HANDLE evControl;		/* Auto-reset event used by the main thread to
				 * signal when the pipe thread should attempt
				 * to do read/write operation. Additionally
				 * used as signal to stop (state set to -1) */
    volatile LONG state;	/* Indicates current state of the thread */
    ClientData clientData;	/* Referenced data of the main thread */
    HANDLE evWakeUp;		/* Optional wake-up event worker set by shutdown */
} TclPipeThreadInfo;


/* If pipe-workers will use some tcl subsystem, we can use ckalloc without
 * more overhead for finalize thread (should be executed anyway)
 *
 * #define _PTI_USE_CKALLOC 1
 */

/*
 * State of the pipe-worker.
 *
 * State PTI_STATE_STOP possible from idle state only, worker owns TI structure.
 * Otherwise PTI_STATE_END used (main thread hold ownership of the TI).
 */

#define PTI_STATE_IDLE	0	/* idle or not yet initialzed */
#define PTI_STATE_WORK	1	/* in work */
#define PTI_STATE_STOP	2	/* thread should stop work (owns TI structure) */
#define PTI_STATE_END	4	/* thread should stop work (worker is busy) */
#define PTI_STATE_DOWN  8	/* worker is down */


MODULE_SCOPE
TclPipeThreadInfo *	TclPipeThreadCreateTI(TclPipeThreadInfo **pipeTIPtr,
			    ClientData clientData, HANDLE wakeEvent);
MODULE_SCOPE int	TclPipeThreadWaitForSignal(TclPipeThreadInfo **pipeTIPtr);

static inline void
TclPipeThreadSignal(
    TclPipeThreadInfo **pipeTIPtr)
{
    TclPipeThreadInfo *pipeTI = *pipeTIPtr;
    if (pipeTI) {
	SetEvent(pipeTI->evControl);
    }
};

static inline int
TclPipeThreadIsAlive(
    TclPipeThreadInfo **pipeTIPtr)
{
    TclPipeThreadInfo *pipeTI = *pipeTIPtr;
    return (pipeTI && pipeTI->state != PTI_STATE_DOWN);
};

MODULE_SCOPE int	TclPipeThreadStopSignal(TclPipeThreadInfo **pipeTIPtr, HANDLE wakeEvent);
MODULE_SCOPE void	TclPipeThreadStop(TclPipeThreadInfo **pipeTIPtr, HANDLE hThread);
MODULE_SCOPE void	TclPipeThreadExit(TclPipeThreadInfo **pipeTIPtr);

#endif	/* _TCLWININT */