source: trunk/src/kernel32/async.cpp@ 111

Last change on this file since 111 was 111, checked in by phaller, 26 years ago

Fix: major restructuring of Open32 handle management, HandleManager
File size: 6.6 KB
Line 
1/* $Id: async.cpp,v 1.4 1999-06-17 18:21:37 phaller Exp $ */
2
3/*
4 * Win32 Asynchronous I/O Subsystem for OS/2
5 *
6 * 1998/04/10 PH Patrick Haller (haller@zebra.fh-weingarten.de)
7 *
8 * @(#) Async.Cpp 1.0.0 1998/04/10 PH start
9 *
10 * Project Odin Software License can be found in LICENSE.TXT
11 *
12 */
13
14#ifndef _ASYNCIOSUBSYSTEM_H_
15#define _ASYNCIOSUBSYSTEM_H_
16
17
18/*****************************************************************************
19 * Remark *
20 *****************************************************************************
21
22 ReadFileEx
23
24 */
25
26
27
28/*****************************************************************************
29 * Includes *
30 *****************************************************************************/
31
32#define INCL_WIN
33#define INCL_DOSMEMMGR
34#define INCL_DOSSEMAPHORES
35#define INCL_DOSERRORS
36#define INCL_DOSPROCESS
37#define INCL_DOSMODULEMGR
38#define INCL_VIO
39#define INCL_AVIO
40#include <os2.h>
41#include <builtin.h>
42
43#include <stdlib.h>
44#include <string.h>
45#include "win32type.h"
46#include "misc.h"
47#include "unicode.h"
48
49// PH: to soothe the compiler
50#define BY_HANDLE_FILE_INFORMATION void
51#define LPFILETIME void*
52#define OFSTRUCT void
53
54#include "handlemanager.h"
55
56
57/*****************************************************************************
58 * Defines & Macros *
59 *****************************************************************************/
60
61
62/*****************************************************************************
63 * Structures *
64 *****************************************************************************/
65
66typedef struct _IORequest
67{
68 struct _IORequest *pNext; /* pointer to next I/O request */
69
70 APIRET rc; /* result code of I/O request */
71
72} IOREQUEST, *PIOREQUEST;
73
74
75typedef struct _Globals
76{
77 HEV hevIOEvent; /* asynchronous I/O event completed ! */
78 TID tidIO; /* I/O thread */
79} GLOBALS, *PGLOBALS;
80
81static GLOBALS Globals;
82
83
84/*****************************************************************************
85 * Name :
86 * Purpose :
87 * Parameters:
88 * Variables :
89 * Result :
90 * Remark :
91 * Status :
92 *
93 * Author : Patrick Haller [Tue, 1998/02/10 01:55]
94 *****************************************************************************/
95
96DWORD WIN32API SleepEx(DWORD dwTimeout,
97 BOOL fAlertable)
98{
99
100 dprintf(("KERNEL32: SleepEx(%u,%u)\n",
101 dwTimeout,
102 fAlertable));
103
104 /* @@@PH could be implemented as a timed wait on a event semaphore */
105 /* for the WAIT_IO_COMPLETION flag */
106
107 if (fAlertable == FALSE)
108 DosSleep(dwTimeout);
109 else {
110 dprintf(("SleepEx: Wait for io completion not supported!"));
111 DosSleep(1);
112 }
113
114 return (0);
115}
116
117
118/*****************************************************************************
119 * Name : BOOL ReadFileEx
120 * Purpose : The ReadFileEx function reads data from a file asynchronously.
121 * It is designed solely for asynchronous operation, unlike the
122 * ReadFile function, which is designed for both synchronous and
123 * asynchronous operation. ReadFileEx lets an application perform
124 * other processing during a file read operation.
125 * The ReadFileEx function reports its completion status asynchronously,
126 * calling a specified completion routine when reading is completed
127 * and the calling thread is in an alertable wait state.
128 * Parameters: HANDLE hFile handle of file to read
129 * LPVOID lpBuffer address of buffer
130 * DWORD nNumberOfBytesToRead number of bytes to read
131 * LPOVERLAPPED lpOverlapped address of offset
132 * LPOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine address of completion routine
133 * Variables :
134 * Result : TRUE / FALSE
135 * Remark :
136 * Status : UNTESTED STUB
137 *
138 * Author : Patrick Haller [Mon, 1998/06/15 08:00]
139 *****************************************************************************/
140
141#define LPOVERLAPPED_COMPLETION_ROUTINE LPVOID
142
143DWORD WIN32API ReadFileEx(HANDLE hFile,
144 LPVOID lpBuffer,
145 DWORD nNumberOfBytesToRead,
146 LPOVERLAPPED lpOverlapped,
147 LPOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine)
148{
149 dprintf(("Kernel32: ReadFileEx(%08xh,%08xh,%08xh,%08xh,%08xh) not implemented.\n",
150 hFile,
151 lpBuffer,
152 nNumberOfBytesToRead,
153 lpOverlapped,
154 lpCompletionRoutine));
155
156
157 return (FALSE);
158}
159
160
161/*****************************************************************************
162 * Name : BOOL WriteFileEx
163 * Purpose : The WriteFileEx function writes data to a file. It is designed
164 * solely for asynchronous operation, unlike WriteFile, which is
165 * designed for both synchronous and asynchronous operation.
166 * WriteFileEx reports its completion status asynchronously,
167 * calling a specified completion routine when writing is completed
168 * and the calling thread is in an alertable wait state.
169 * Parameters: HANDLE hFile handle of file to write
170 * LPVOID lpBuffer address of buffer
171 * DWORD nNumberOfBytesToRead number of bytes to write
172 * LPOVERLAPPED lpOverlapped address of offset
173 * LPOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine address of completion routine
174 * Variables :
175 * Result : TRUE / FALSE
176 * Remark :
177 * Status : UNTESTED STUB
178 *
179 * Author : Patrick Haller [Mon, 1998/06/15 08:00]
180 *****************************************************************************/
181
182DWORD WIN32API WriteFileEx(HANDLE hFile,
183 LPVOID lpBuffer,
184 DWORD nNumberOfBytesToWrite,
185 LPOVERLAPPED lpOverlapped,
186 LPOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine)
187{
188 dprintf(("Kernel32: WriteFileEx(%08xh,%08xh,%08xh,%08xh,%08xh) not implemented.\n",
189 hFile,
190 lpBuffer,
191 nNumberOfBytesToWrite,
192 lpOverlapped,
193 lpCompletionRoutine));
194
195
196 return (FALSE);
197}
198
199
200#endif /* _ASYNCIOSUBSYSTEM_H_ */
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