VirtualBox

source: vbox/trunk/src/VBox/HostServices/SharedClipboard/darwin.cpp@ 54558

Last change on this file since 54558 was 44529, checked in by vboxsync, 12 years ago

header (C) fixes

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File size: 7.4 KB
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1/* $Id: darwin.cpp 44529 2013-02-04 15:54:15Z vboxsync $ */
2/** @file
3 * Shared Clipboard: Mac OS X host.
4 */
5
6/*
7 * Copyright (C) 2008-2011 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 */
17
18#include <VBox/HostServices/VBoxClipboardSvc.h>
19
20#include <iprt/assert.h>
21#include <iprt/asm.h>
22#include <iprt/thread.h>
23
24#include "VBoxClipboard.h"
25#include "darwin-pasteboard.h"
26
27/** Global clipboard context information */
28struct _VBOXCLIPBOARDCONTEXT
29{
30 /** We have a separate thread to poll for new clipboard content */
31 RTTHREAD thread;
32 bool volatile fTerminate;
33
34 /** The reference to the current pasteboard */
35 PasteboardRef pasteboard;
36
37 VBOXCLIPBOARDCLIENTDATA *pClient;
38};
39
40/** Only one client is supported. There seems to be no need for more clients. */
41static VBOXCLIPBOARDCONTEXT g_ctx;
42
43
44/**
45 * Checks if something is present on the clipboard and calls vboxSvcClipboardReportMsg.
46 *
47 * @returns IPRT status code (ignored).
48 * @param pCtx The context.
49 */
50static int vboxClipboardChanged (VBOXCLIPBOARDCONTEXT *pCtx)
51{
52 if (pCtx->pClient == NULL)
53 return VINF_SUCCESS;
54
55 uint32_t fFormats = 0;
56 bool fChanged = false;
57 /* Retrieve the formats currently in the clipboard and supported by vbox */
58 int rc = queryNewPasteboardFormats (pCtx->pasteboard, &fFormats, &fChanged);
59 if (RT_SUCCESS (rc) && fChanged)
60 {
61 vboxSvcClipboardReportMsg (pCtx->pClient, VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS, fFormats);
62 Log (("vboxClipboardChanged fFormats %02X\n", fFormats));
63 }
64
65 return rc;
66}
67
68
69/**
70 * The poller thread.
71 *
72 * This thread will check for the arrival of new data on the clipboard.
73 *
74 * @returns VINF_SUCCESS (not used).
75 * @param Thread Our thread handle.
76 * @param pvUser Pointer to the VBOXCLIPBOARDCONTEXT structure.
77 *
78 */
79static int vboxClipboardThread (RTTHREAD ThreadSelf, void *pvUser)
80{
81 Log (("vboxClipboardThread: starting clipboard thread\n"));
82
83 AssertPtrReturn (pvUser, VERR_INVALID_PARAMETER);
84 VBOXCLIPBOARDCONTEXT *pCtx = (VBOXCLIPBOARDCONTEXT *) pvUser;
85
86 while (!pCtx->fTerminate)
87 {
88 /* call this behind the lock because we don't know if the api is
89 thread safe and in any case we're calling several methods. */
90 vboxSvcClipboardLock();
91 vboxClipboardChanged (pCtx);
92 vboxSvcClipboardUnlock();
93
94 /* Sleep for 200 msecs before next poll */
95 RTThreadUserWait (ThreadSelf, 200);
96 }
97
98 Log (("vboxClipboardThread: clipboard thread terminated successfully with return code %Rrc\n", VINF_SUCCESS));
99 return VINF_SUCCESS;
100}
101
102/*
103 * Public platform dependent functions.
104 */
105
106/** Initialise the host side of the shared clipboard - called by the hgcm layer. */
107int vboxClipboardInit (void)
108{
109 Log (("vboxClipboardInit\n"));
110
111 g_ctx.fTerminate = false;
112
113 int rc = initPasteboard (&g_ctx.pasteboard);
114 AssertRCReturn (rc, rc);
115
116 rc = RTThreadCreate (&g_ctx.thread, vboxClipboardThread, &g_ctx, 0,
117 RTTHREADTYPE_IO, RTTHREADFLAGS_WAITABLE, "SHCLIP");
118 if (RT_FAILURE (rc))
119 {
120 g_ctx.thread = NIL_RTTHREAD;
121 destroyPasteboard (&g_ctx.pasteboard);
122 }
123
124 return rc;
125}
126
127/** Terminate the host side of the shared clipboard - called by the hgcm layer. */
128void vboxClipboardDestroy (void)
129{
130 Log (("vboxClipboardDestroy\n"));
131
132 /*
133 * Signal the termination of the polling thread and wait for it to respond.
134 */
135 ASMAtomicWriteBool (&g_ctx.fTerminate, true);
136 int rc = RTThreadUserSignal (g_ctx.thread);
137 AssertRC (rc);
138 rc = RTThreadWait (g_ctx.thread, RT_INDEFINITE_WAIT, NULL);
139 AssertRC (rc);
140
141 /*
142 * Destroy the pasteboard and uninitialize the global context record.
143 */
144 destroyPasteboard (&g_ctx.pasteboard);
145 g_ctx.thread = NIL_RTTHREAD;
146 g_ctx.pClient = NULL;
147}
148
149/**
150 * Enable the shared clipboard - called by the hgcm clipboard subsystem.
151 *
152 * @param pClient Structure containing context information about the guest system
153 * @returns RT status code
154 */
155int vboxClipboardConnect (VBOXCLIPBOARDCLIENTDATA *pClient, bool)
156{
157 if (g_ctx.pClient != NULL)
158 {
159 /* One client only. */
160 return VERR_NOT_SUPPORTED;
161 }
162
163 vboxSvcClipboardLock();
164
165 pClient->pCtx = &g_ctx;
166 pClient->pCtx->pClient = pClient;
167
168 /* Initially sync the host clipboard content with the client. */
169 int rc = vboxClipboardSync (pClient);
170
171 vboxSvcClipboardUnlock();
172 return rc;
173}
174
175/**
176 * Synchronise the contents of the host clipboard with the guest, called by the HGCM layer
177 * after a save and restore of the guest.
178 */
179int vboxClipboardSync (VBOXCLIPBOARDCLIENTDATA *pClient)
180{
181 /* Sync the host clipboard content with the client. */
182 vboxSvcClipboardLock();
183 int rc = vboxClipboardChanged (pClient->pCtx);
184 vboxSvcClipboardUnlock();
185
186 return rc;
187}
188
189/**
190 * Shut down the shared clipboard subsystem and "disconnect" the guest.
191 */
192void vboxClipboardDisconnect (VBOXCLIPBOARDCLIENTDATA *pClient)
193{
194 Log (("vboxClipboardDisconnect\n"));
195
196 vboxSvcClipboardLock();
197 pClient->pCtx->pClient = NULL;
198 vboxSvcClipboardUnlock();
199}
200
201/**
202 * The guest is taking possession of the shared clipboard. Called by the HGCM clipboard
203 * subsystem.
204 *
205 * @param pClient Context data for the guest system
206 * @param u32Formats Clipboard formats the guest is offering
207 */
208void vboxClipboardFormatAnnounce (VBOXCLIPBOARDCLIENTDATA *pClient, uint32_t u32Formats)
209{
210 Log (("vboxClipboardFormatAnnounce u32Formats %02X\n", u32Formats));
211 if (u32Formats == 0)
212 {
213 /* This is just an automatism, not a genuine announcement */
214 return;
215 }
216
217 vboxSvcClipboardReportMsg (pClient, VBOX_SHARED_CLIPBOARD_HOST_MSG_READ_DATA,
218 u32Formats);
219}
220
221/**
222 * Called by the HGCM clipboard subsystem when the guest wants to read the host clipboard.
223 *
224 * @param pClient Context information about the guest VM
225 * @param u32Format The format that the guest would like to receive the data in
226 * @param pv Where to write the data to
227 * @param cb The size of the buffer to write the data to
228 * @param pcbActual Where to write the actual size of the written data
229 */
230int vboxClipboardReadData (VBOXCLIPBOARDCLIENTDATA *pClient, uint32_t u32Format,
231 void *pv, uint32_t cb, uint32_t * pcbActual)
232{
233 vboxSvcClipboardLock();
234
235 /* Default to no data available. */
236 *pcbActual = 0;
237 int rc = readFromPasteboard (pClient->pCtx->pasteboard, u32Format, pv, cb, pcbActual);
238
239 vboxSvcClipboardUnlock();
240 return rc;
241}
242
243/**
244 * Called by the HGCM clipboard subsystem when we have requested data and that data arrives.
245 *
246 * @param pClient Context information about the guest VM
247 * @param pv Buffer to which the data was written
248 * @param cb The size of the data written
249 * @param u32Format The format of the data written
250 */
251void vboxClipboardWriteData (VBOXCLIPBOARDCLIENTDATA *pClient, void *pv,
252 uint32_t cb, uint32_t u32Format)
253{
254 vboxSvcClipboardLock();
255
256 writeToPasteboard (pClient->pCtx->pasteboard, pv, cb, u32Format);
257
258 vboxSvcClipboardUnlock();
259}
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