source: trunk/src/kernel32/async.cpp@ 4

Last change on this file since 4 was 4, checked in by ktk, 26 years ago

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1/* $Id: async.cpp,v 1.1 1999-05-24 20:19:43 ktk 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#include "handlemanager.h"
49
50
51/*****************************************************************************
52 * Defines & Macros *
53 *****************************************************************************/
54
55
56/*****************************************************************************
57 * Structures *
58 *****************************************************************************/
59
60typedef struct _IORequest
61{
62 struct _IORequest *pNext; /* pointer to next I/O request */
63
64 APIRET rc; /* result code of I/O request */
65
66} IOREQUEST, *PIOREQUEST;
67
68
69typedef struct _Globals
70{
71 HEV hevIOEvent; /* asynchronous I/O event completed ! */
72 TID tidIO; /* I/O thread */
73} GLOBALS, *PGLOBALS;
74
75static GLOBALS Globals;
76
77
78/*****************************************************************************
79 * Name :
80 * Purpose :
81 * Parameters:
82 * Variables :
83 * Result :
84 * Remark :
85 * Status :
86 *
87 * Author : Patrick Haller [Tue, 1998/02/10 01:55]
88 *****************************************************************************/
89
90DWORD WIN32API SleepEx(DWORD dwTimeout,
91 BOOL fAlertable)
92{
93
94 dprintf(("KERNEL32: SleepEx(%u,%u)\n",
95 dwTimeout,
96 fAlertable));
97
98 /* @@@PH could be implemented as a timed wait on a event semaphore */
99 /* for the WAIT_IO_COMPLETION flag */
100
101 if (fAlertable == FALSE)
102 DosSleep(dwTimeout);
103 else {
104 dprintf(("SleepEx: Wait for io completion not supported!"));
105 DosSleep(1);
106 }
107
108 return (0);
109}
110
111
112/*****************************************************************************
113 * Name : BOOL ReadFileEx
114 * Purpose : The ReadFileEx function reads data from a file asynchronously.
115 * It is designed solely for asynchronous operation, unlike the
116 * ReadFile function, which is designed for both synchronous and
117 * asynchronous operation. ReadFileEx lets an application perform
118 * other processing during a file read operation.
119 * The ReadFileEx function reports its completion status asynchronously,
120 * calling a specified completion routine when reading is completed
121 * and the calling thread is in an alertable wait state.
122 * Parameters: HANDLE hFile handle of file to read
123 * LPVOID lpBuffer address of buffer
124 * DWORD nNumberOfBytesToRead number of bytes to read
125 * LPOVERLAPPED lpOverlapped address of offset
126 * LPOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine address of completion routine
127 * Variables :
128 * Result : TRUE / FALSE
129 * Remark :
130 * Status : UNTESTED STUB
131 *
132 * Author : Patrick Haller [Mon, 1998/06/15 08:00]
133 *****************************************************************************/
134
135#define LPOVERLAPPED_COMPLETION_ROUTINE LPVOID
136
137DWORD WIN32API ReadFileEx(HANDLE hFile,
138 LPVOID lpBuffer,
139 DWORD nNumberOfBytesToRead,
140 LPOVERLAPPED lpOverlapped,
141 LPOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine)
142{
143 dprintf(("Kernel32: ReadFileEx(%08xh,%08xh,%08xh,%08xh,%08xh) not implemented.\n",
144 hFile,
145 lpBuffer,
146 nNumberOfBytesToRead,
147 lpOverlapped,
148 lpCompletionRoutine));
149
150
151 return (FALSE);
152}
153
154
155/*****************************************************************************
156 * Name : BOOL WriteFileEx
157 * Purpose : The WriteFileEx function writes data to a file. It is designed
158 * solely for asynchronous operation, unlike WriteFile, which is
159 * designed for both synchronous and asynchronous operation.
160 * WriteFileEx reports its completion status asynchronously,
161 * calling a specified completion routine when writing is completed
162 * and the calling thread is in an alertable wait state.
163 * Parameters: HANDLE hFile handle of file to write
164 * LPVOID lpBuffer address of buffer
165 * DWORD nNumberOfBytesToRead number of bytes to write
166 * LPOVERLAPPED lpOverlapped address of offset
167 * LPOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine address of completion routine
168 * Variables :
169 * Result : TRUE / FALSE
170 * Remark :
171 * Status : UNTESTED STUB
172 *
173 * Author : Patrick Haller [Mon, 1998/06/15 08:00]
174 *****************************************************************************/
175
176DWORD WIN32API WriteFileEx(HANDLE hFile,
177 LPVOID lpBuffer,
178 DWORD nNumberOfBytesToWrite,
179 LPOVERLAPPED lpOverlapped,
180 LPOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine)
181{
182 dprintf(("Kernel32: WriteFileEx(%08xh,%08xh,%08xh,%08xh,%08xh) not implemented.\n",
183 hFile,
184 lpBuffer,
185 nNumberOfBytesToWrite,
186 lpOverlapped,
187 lpCompletionRoutine));
188
189
190 return (FALSE);
191}
192
193
194#endif /* _ASYNCIOSUBSYSTEM_H_ */
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