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unload msimg32.dll earlier (before static cleanup time) to avoid lockups when wx is used as DLL; don't use wxOnceOnlyDLLLoader for gdi32.dll as we don't need to keep this DLL loaded, it will stay in memory anyhow as we link to it statically

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@50263 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 2007-11-26 21:27:17 +00:00
parent 79b7b95aed
commit 60b0c3b4c6
1 changed files with 29 additions and 6 deletions
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35
src/msw/dc.cpp
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@ -238,14 +238,37 @@ public:
return m_dll.IsLoaded() ? m_dll.GetSymbol(name) : NULL;
}
void Unload()
{
if ( m_dll.IsLoaded() )
{
m_dll.Unload();
}
}
private:
wxDynamicLibrary m_dll;
const wxChar *m_dllName;
};
static wxOnceOnlyDLLLoader wxGDI32DLL(_T("gdi32"));
static wxOnceOnlyDLLLoader wxMSIMG32DLL(_T("msimg32"));
// we must ensure that DLLs are unloaded before the static objects cleanup time
// because we may hit the notorious DllMain() dead lock in this case if wx is
// used as a DLL (attempting to unload another DLL from inside DllMain() hangs
// under Windows because it tries to reacquire the same lock)
class wxGDIDLLsCleanupModule : public wxModule
{
public:
virtual bool OnInit() { return true; }
virtual void OnExit() { wxMSIMG32DLL.Unload(); }
private:
DECLARE_DYNAMIC_CLASS(wxGDIDLLsCleanupModule)
};
IMPLEMENT_DYNAMIC_CLASS(wxGDIDLLsCleanupModule, wxModule)
#endif // wxUSE_DYNLIB_CLASS
// ===========================================================================
@ -2694,9 +2717,9 @@ static DWORD wxGetDCLayout(HDC hdc)
{
typedef DWORD (WINAPI *GetLayout_t)(HDC);
static GetLayout_t
pfnGetLayout = (GetLayout_t)wxGDI32DLL.GetSymbol(_T("GetLayout"));
wxDL_INIT_FUNC(s_pfn, GetLayout, wxDynamicLibrary(_T("gdi32.dll")));
return pfnGetLayout ? pfnGetLayout(hdc) : (DWORD)-1;
return s_pfnGetLayout ? s_pfnGetLayout(hdc) : (DWORD)-1;
}
wxLayoutDirection wxDC::GetLayoutDirection() const
@ -2713,8 +2736,8 @@ void wxDC::SetLayoutDirection(wxLayoutDirection dir)
{
typedef DWORD (WINAPI *SetLayout_t)(HDC, DWORD);
static SetLayout_t
pfnSetLayout = (SetLayout_t)wxGDI32DLL.GetSymbol(_T("SetLayout"));
if ( !pfnSetLayout )
wxDL_INIT_FUNC(s_pfn, SetLayout, wxDynamicLibrary(_T("gdi32.dll")));
if ( !s_pfnSetLayout )
return;
if ( dir == wxLayout_Default )
@ -2730,7 +2753,7 @@ void wxDC::SetLayoutDirection(wxLayoutDirection dir)
else
layout &= ~LAYOUT_RTL;
pfnSetLayout(GetHdc(), layout);
s_pfnSetLayout(GetHdc(), layout);
}
#else // !wxUSE_DYNLIB_CLASS