1 /*****************************************************************************
2 * specific.c: Win32 specific initilization
3 *****************************************************************************
4 * Copyright (C) 2001-2004, 2010 VLC authors and VideoLAN
5 *
6 * Authors: Samuel Hocevar <sam@zoy.org>
7 * Gildas Bazin <gbazin@videolan.org>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU Lesser General Public License as published by
11 * the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
23
24 #ifdef HAVE_CONFIG_H
25 # include "config.h"
26 #endif
27
28 #ifndef UNICODE
29 # define UNICODE
30 #endif
31 #include <vlc_common.h>
32 #include "libvlc.h"
33 #include "../lib/libvlc_internal.h"
34 #include "config/vlc_getopt.h"
35
36 #include <mmsystem.h>
37 #include <winsock.h>
38 #if VLC_WINSTORE_APP && !defined(__MINGW32__)
39 typedef UINT MMRESULT;
40 #endif
41
42 DWORD LoadLibraryFlags = 0;
43
system_InitWSA(int hi,int lo)44 static int system_InitWSA(int hi, int lo)
45 {
46 WSADATA data;
47
48 if (WSAStartup(MAKEWORD(hi, lo), &data) == 0)
49 {
50 if (LOBYTE(data.wVersion) == 2 && HIBYTE(data.wVersion) == 2)
51 return 0;
52 /* Winsock DLL is not usable */
53 WSACleanup( );
54 }
55 return -1;
56 }
57
58 /**
59 * Initializes MME timer, Winsock.
60 */
system_Init(void)61 void system_Init(void)
62 {
63 if (system_InitWSA(2, 2) && system_InitWSA(1, 1))
64 fputs("Error: cannot initialize Winsocks\n", stderr);
65
66 #if !VLC_WINSTORE_APP
67 # if (_WIN32_WINNT < _WIN32_WINNT_WIN8)
68 if (GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")),
69 "SetDefaultDllDirectories") != NULL)
70 # endif /* FIXME: not reentrant */
71 LoadLibraryFlags = LOAD_LIBRARY_SEARCH_SYSTEM32;
72 #endif
73 }
74
75 /*****************************************************************************
76 * system_Configure: check for system specific configuration options.
77 *****************************************************************************/
78
79 /* Must be same as in modules/control/win_msg.c */
80 typedef struct
81 {
82 int argc;
83 int enqueue;
84 char data[];
85 } vlc_ipc_data_t;
86
system_Configure(libvlc_int_t * p_this,int i_argc,const char * const ppsz_argv[])87 void system_Configure( libvlc_int_t *p_this, int i_argc, const char *const ppsz_argv[] )
88 {
89 #if !VLC_WINSTORE_APP
90 if( var_InheritBool( p_this, "one-instance" )
91 || ( var_InheritBool( p_this, "one-instance-when-started-from-file" )
92 && var_InheritBool( p_this, "started-from-file" ) ) )
93 {
94 HANDLE hmutex;
95
96 msg_Info( p_this, "one instance mode ENABLED");
97
98 /* Use a named mutex to check if another instance is already running */
99 if( !( hmutex = CreateMutex( 0, TRUE, L"VLC ipc " TEXT(VERSION) ) ) )
100 {
101 /* Failed for some reason. Just ignore the option and go on as
102 * normal. */
103 msg_Err( p_this, "one instance mode DISABLED "
104 "(mutex couldn't be created)" );
105 return;
106 }
107
108 if( GetLastError() != ERROR_ALREADY_EXISTS )
109 {
110 libvlc_InternalAddIntf( p_this, "win_msg,none" );
111 /* Initialization done.
112 * Release the mutex to unblock other instances */
113 ReleaseMutex( hmutex );
114 }
115 else
116 {
117 /* Another instance is running */
118
119 HWND ipcwindow;
120
121 /* Wait until the 1st instance is initialized */
122 WaitForSingleObject( hmutex, INFINITE );
123
124 /* Locate the window created by the IPC helper thread of the
125 * 1st instance */
126 if( !( ipcwindow = FindWindow( 0, L"VLC ipc " TEXT(VERSION) ) ) )
127 {
128 msg_Err( p_this, "one instance mode DISABLED "
129 "(couldn't find 1st instance of program)" );
130 ReleaseMutex( hmutex );
131 return;
132 }
133
134 /* We assume that the remaining parameters are filenames
135 * and their input options */
136 if( i_argc > 0 )
137 {
138 COPYDATASTRUCT wm_data;
139 int i_opt;
140 vlc_ipc_data_t *p_data;
141 size_t i_data = sizeof (*p_data);
142
143 for( i_opt = 0; i_opt < i_argc; i_opt++ )
144 {
145 i_data += sizeof (size_t);
146 i_data += strlen( ppsz_argv[ i_opt ] ) + 1;
147 }
148
149 p_data = malloc( i_data );
150 p_data->argc = i_argc;
151 p_data->enqueue = var_InheritBool( p_this, "playlist-enqueue" );
152 i_data = 0;
153 for( i_opt = 0; i_opt < i_argc; i_opt++ )
154 {
155 size_t i_len = strlen( ppsz_argv[ i_opt ] ) + 1;
156 /* Windows will never switch to an architecture
157 * with stronger alignment requirements, right. */
158 *((size_t *)(p_data->data + i_data)) = i_len;
159 i_data += sizeof (size_t);
160 memcpy( &p_data->data[i_data], ppsz_argv[ i_opt ], i_len );
161 i_data += i_len;
162 }
163 i_data += sizeof (*p_data);
164
165 /* Send our playlist items to the 1st instance */
166 wm_data.dwData = 0;
167 wm_data.cbData = i_data;
168 wm_data.lpData = p_data;
169 SendMessage( ipcwindow, WM_COPYDATA, 0, (LPARAM)&wm_data );
170 }
171
172 /* Initialization done.
173 * Release the mutex to unblock other instances */
174 ReleaseMutex( hmutex );
175
176 /* Bye bye */
177 system_End( );
178 exit( 0 );
179 }
180 }
181 #endif
182 }
183
184 /**
185 * Cleans up after system_Init() and system_Configure().
186 */
system_End(void)187 void system_End(void)
188 {
189 /* XXX: In theory, we should not call this if WSAStartup() failed. */
190 WSACleanup();
191 }
192