janwas
e6be7e36d2
ERR_(FILE|PATH)_NOT_FOUND -> ERR_TNODE_NOT_FOUND, ERR_NOT_(FILE|DIR) -> ERR_TNODE_WRONG TYPE path_util: - path_append: bugfix (no more extraneous /); add support for appending slash - path_replace: bugfix (no more warnings for expected error) - add path_last_component, path_foreach_component - move some defs to the header that belong there from vfs.h/path.h file: add dir_create; move PosixFile definition here and provide accessor for fileio vfs: no longer automatically append slash; instead, make sure caller does vfs_mount: - mount_realpath: bugfix (strip trailing /), interface improvement - document write_target; clarify MULTIPLE_MOUNTINGS; add support for creating real dirs vfs_tree: - refactor TDir::add into find, add, find_and_add - fix TDir and TNode for dir-ends-with-slash requirement - split up lookup into lookup_cb and path_foreach_component - add support for inserting dirs with given mount point: tree_add_path (needed when mounting) wposix: get rid of weird PATH_MAX = 260 (Win32 weirdness) TextureManager: remove no longer needed SupportedTextureFormats GameSetup, Xeromyces: setup XMB location to data/cache/mods/official/xmb Util: HardcodedErrorString now uses error_description_r VFSUtil, i18n: fixes for dir slash issue Closes #79, #80 This was SVN commit r3874.
382 lines
11 KiB
C++
382 lines
11 KiB
C++
/**
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* =========================================================================
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* File : win.cpp
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* Project : 0 A.D.
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* Description : various Windows-specific code and program entry point.
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*
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* @author Jan.Wassenberg@stud.uni-karlsruhe.de
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* =========================================================================
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*/
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/*
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* Copyright (c) 2003-2004 Jan Wassenberg
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*
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* Redistribution and/or modification are also permitted under the
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* terms of the GNU General Public License as published by the
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* Free Software Foundation (version 2 or later, at your option).
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include "precompiled.h"
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#include <stdio.h>
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#include <stdlib.h> // __argc
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#include "win_internal.h"
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#include "lib/path_util.h"
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#if MSC_VERSION >= 1400
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#include <process.h> // __security_init_cookie
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#define NEED_COOKIE_INIT
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#endif
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char win_sys_dir[MAX_PATH+1];
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char win_exe_dir[MAX_PATH+1];
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// only call after a Win32 function indicates failure.
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static LibError LibError_from_GLE(bool warn_if_failed = true)
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{
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LibError err;
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switch(GetLastError())
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{
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case ERROR_OUTOFMEMORY:
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err = ERR_NO_MEM; break;
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case ERROR_INVALID_PARAMETER:
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err = ERR_INVALID_PARAM; break;
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case ERROR_INSUFFICIENT_BUFFER:
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err = ERR_BUF_SIZE; break;
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case ERROR_ACCESS_DENIED:
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err = ERR_FILE_ACCESS; break;
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case ERROR_FILE_NOT_FOUND:
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case ERROR_PATH_NOT_FOUND:
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err = ERR_TNODE_NOT_FOUND; break;
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default:
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err = ERR_FAIL; break;
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}
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if(warn_if_failed)
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DEBUG_WARN_ERR(err);
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return err;
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}
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// return the LibError equivalent of GetLastError(), or ERR_FAIL if
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// there's no equal.
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// you should SetLastError(0) before calling whatever will set ret
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// to make sure we do not return any stale errors.
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LibError LibError_from_win32(DWORD ret, bool warn_if_failed)
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{
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if(ret != FALSE)
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return ERR_OK;
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return LibError_from_GLE(warn_if_failed);
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}
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//-----------------------------------------------------------------------------
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//
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// safe allocator that may be used independently of libc malloc
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// (in particular, before _cinit and while calling static dtors).
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// used by wpthread critical section code.
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//
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void* win_alloc(size_t size)
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{
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const DWORD flags = HEAP_ZERO_MEMORY;
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return HeapAlloc(GetProcessHeap(), flags, size);
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}
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void win_free(void* p)
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{
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const DWORD flags = 0;
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HeapFree(GetProcessHeap(), flags, p);
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// module init and shutdown mechanism
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//
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///////////////////////////////////////////////////////////////////////////////
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// init and shutdown mechanism: register a function to be called at
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// pre-libc init, pre-main init or shutdown.
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//
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// each module has the linker add a pointer to its init or shutdown
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// function to a table (at a user-defined position).
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// zero runtime overhead, and there's no need for a central dispatcher
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// that knows about all the modules.
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//
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// disadvantage: requires compiler support (MS VC-specific).
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//
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// alternatives:
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// - initialize via constructor. however, that would leave the problem of
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// shutdown order and timepoint, which is also taken care of here.
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// - register init/shutdown functions from a NLSO constructor:
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// clunky, and setting order is more difficult.
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// - on-demand initialization: complicated; don't know in what order
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// things happen. also, no way to determine how long init takes.
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//
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// the "segment name" determines when and in what order the functions are
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// called: "LIB$W{type}{group}", where {type} is C for pre-libc init,
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// I for pre-main init, or T for terminators (last of the atexit handlers).
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// {group} is [B, Y]; groups are called in alphabetical order, but
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// call order within the group itself is unspecified.
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//
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// define the segment via #pragma data_seg(name), register any functions
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// to be called via WIN_REGISTER_FUNC, and then restore the previous segment
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// with #pragma data_seg() .
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//
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// note: group must be [B, Y]. data declared in groups A or Z may
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// be placed beyond the table start/end by the linker, since the linker's
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// ordering WRT other source files' data is undefined within a segment.
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typedef LibError (*_PIFV)(void);
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// pointers to start and end of function tables.
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// note: COFF tosses out empty segments, so we have to put in one value
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// (zero, because call_func_tbl has to ignore NULL entries anyway).
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#pragma data_seg(WIN_CALLBACK_PRE_LIBC(a))
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_PIFV pre_libc_begin[] = { 0 };
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#pragma data_seg(WIN_CALLBACK_PRE_LIBC(z))
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_PIFV pre_libc_end[] = { 0 };
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#pragma data_seg(WIN_CALLBACK_PRE_MAIN(a))
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_PIFV pre_main_begin[] = { 0 };
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#pragma data_seg(WIN_CALLBACK_PRE_MAIN(z))
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_PIFV pre_main_end[] = { 0 };
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#pragma data_seg(WIN_CALLBACK_POST_ATEXIT(a))
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_PIFV shutdown_begin[] = { 0 };
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#pragma data_seg(WIN_CALLBACK_POST_ATEXIT(z))
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_PIFV shutdown_end[] = { 0 };
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#pragma data_seg()
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#pragma comment(linker, "/merge:.LIB=.data")
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// call all non-NULL function pointers in [begin, end).
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// note: the range may be larger than expected due to section padding.
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// that (and the COFF empty section problem) is why we need to ignore zeroes.
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static void call_func_tbl(_PIFV* begin, _PIFV* end)
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{
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for(_PIFV* p = begin; p < end; p++)
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if(*p)
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(*p)();
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}
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//-----------------------------------------------------------------------------
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// locking for win-specific code
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//-----------------------------------------------------------------------------
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// several init functions are before called before _cinit.
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// POSIX static mutex init may not have been done by then,
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// so we need our own lightweight functions.
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static CRITICAL_SECTION cs[NUM_CS];
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static bool cs_valid;
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void win_lock(uint idx)
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{
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debug_assert(idx < NUM_CS && "win_lock: invalid critical section index");
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if(cs_valid)
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EnterCriticalSection(&cs[idx]);
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}
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void win_unlock(uint idx)
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{
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debug_assert(idx < NUM_CS && "win_unlock: invalid critical section index");
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if(cs_valid)
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LeaveCriticalSection(&cs[idx]);
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}
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int win_is_locked(uint idx)
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{
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debug_assert(idx < NUM_CS && "win_is_locked: invalid critical section index");
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if(!cs_valid)
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return -1;
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BOOL got_it = TryEnterCriticalSection(&cs[idx]);
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if(got_it)
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LeaveCriticalSection(&cs[idx]);
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return !got_it;
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}
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static void cs_init()
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{
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for(int i = 0; i < NUM_CS; i++)
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InitializeCriticalSection(&cs[i]);
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cs_valid = true;
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}
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static void cs_shutdown()
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{
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cs_valid = false;
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for(int i = 0; i < NUM_CS; i++)
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DeleteCriticalSection(&cs[i]);
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memset(cs, 0, sizeof(cs));
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}
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//-----------------------------------------------------------------------------
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// startup
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//-----------------------------------------------------------------------------
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// entry -> pre_libc -> WinMainCRTStartup -> WinMain -> pre_main -> main
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// at_exit is called as the last of the atexit handlers
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// (assuming, as documented in lib.cpp, constructors don't use atexit!)
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//
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// rationale: we need to gain control after _cinit and before main() to
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// complete initialization.
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// note: this way of getting control before main adds overhead
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// (setting up the WinMain parameters), but is simpler and safer than
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// SDL-style #define main SDL_main.
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// explained where used.
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static HMODULE hUser32Dll;
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static void at_exit(void)
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{
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call_func_tbl(shutdown_begin, shutdown_end);
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cs_shutdown();
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// free the reference taken in win_pre_libc_init;
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// this avoids Boundschecker warnings at exit.
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FreeLibrary(hUser32Dll);
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}
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#ifndef NO_MAIN_REDIRECT
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static
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#endif
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void win_pre_main_init()
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{
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// enable memory tracking and leak detection;
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// no effect if !HAVE_VC_DEBUG_ALLOC.
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#if CONFIG_PARANOIA
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debug_heap_enable(DEBUG_HEAP_ALL);
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#elif !defined(NDEBUG)
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debug_heap_enable(DEBUG_HEAP_NORMAL);
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#endif
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call_func_tbl(pre_main_begin, pre_main_end);
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atexit(at_exit);
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// no point redirecting stdout yet - the current directory
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// may be incorrect (file_set_root not yet called).
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// (w)sdl will take care of it anyway.
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}
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#ifndef NO_MAIN_REDIRECT
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#undef main
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extern int app_main(int argc, char* argv[]);
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int main(int argc, char* argv[])
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{
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win_pre_main_init();
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return app_main(argc, argv);
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}
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#endif
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// perform all initialization that needs to run before _cinit
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// (which calls C++ ctors).
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// be very careful to avoid non-stateless libc functions!
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static inline void pre_libc_init()
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{
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// enable low-fragmentation heap
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#if WINVER >= 0x0501
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HMODULE hKernel32Dll = LoadLibrary("kernel32.dll");
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if(hKernel32Dll)
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{
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BOOL (WINAPI* pHeapSetInformation)(HANDLE, HEAP_INFORMATION_CLASS, void*, size_t);
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*(void**)&pHeapSetInformation = GetProcAddress(hKernel32Dll, "HeapSetInformation");
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if(pHeapSetInformation)
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{
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ULONG flags = 2; // enable LFH
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pHeapSetInformation(GetProcessHeap(), HeapCompatibilityInformation, &flags, sizeof(flags));
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}
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FreeLibrary(hKernel32Dll);
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}
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#endif // #if WINVER >= 0x0501
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cs_init();
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GetSystemDirectory(win_sys_dir, sizeof(win_sys_dir));
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if(GetModuleFileName(GetModuleHandle(0), win_exe_dir, MAX_PATH) != 0)
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path_strip_fn(win_exe_dir);
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// HACK: make sure a reference to user32 is held, even if someone
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// decides to delay-load it. this fixes bug #66, which was the
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// Win32 mouse cursor (set via user32!SetCursor) appearing as a
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// black 32x32(?) rectangle. underlying cause was as follows:
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// powrprof.dll was the first client of user32, causing it to be
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// loaded. after we were finished with powrprof, we freed it, in turn
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// causing user32 to unload. later code would then reload user32,
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// which apparently terminally confused the cursor implementation.
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//
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// since we hold a reference here, user32 will never unload.
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// of course, the benefits of delay-loading are lost for this DLL,
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// but that is unavoidable. it is safer to force loading it, rather
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// than documenting the problem and asking it not be delay-loaded.
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hUser32Dll = LoadLibrary("user32.dll");
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call_func_tbl(pre_libc_begin, pre_libc_end);
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}
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static int SEH_wrapped_entry()
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{
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int ret;
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__try
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{
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pre_libc_init();
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#ifdef USE_WINMAIN
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ret = WinMainCRTStartup(); // calls _cinit and then our main
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#else
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ret = mainCRTStartup(); // calls _cinit and then our main
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#endif
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}
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__except(wdbg_exception_filter(GetExceptionInformation()))
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{
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ret = -1;
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}
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return ret;
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}
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int entry()
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{
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#ifdef NEED_COOKIE_INIT
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// 2006-02-16 workaround for R6035 on VC8:
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//
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// SEH code compiled with /GS pushes a "security cookie" onto the
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// stack. since we're called before _cinit, the cookie won't have
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// been initialized yet, which would cause the CRT to FatalAppExit.
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// to solve this, we must call __security_init_cookie before any
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// hidden compiler-generated SEH registration code runs,
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// which means the __try block must be moved into a helper function.
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//
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// NB: entry() must not contain local string buffers, either -
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// /GS would install a cookie here as well (same problem).
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//
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// see http://msdn2.microsoft.com/en-US/library/ms235603.aspx
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__security_init_cookie();
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#endif
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return SEH_wrapped_entry();
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}
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