/*
Acknowledgements: this header is heavily based on (well, almost the exact
- copy of) wxScopeGuard.h by Andrei Alexandrescu and Petru Marginean published
+ copy of) ScopeGuard.h by Andrei Alexandrescu and Petru Marginean published
in December 2000 issue of C/C++ Users Journal.
+ http://www.cuj.com/documents/cujcexp1812alexandr/
*/
#ifndef _WX_SCOPEGUARD_H_
// helpers
// ----------------------------------------------------------------------------
+#ifdef __WATCOMC__
+
+// WATCOM-FIXME: C++ of Open Watcom 1.3 doesn't like OnScopeExit() created
+// through template so it must be workarounded with dedicated inlined macro.
+// For compatibility with Watcom compilers wxPrivate::OnScopeExit must be
+// replaced with wxPrivateOnScopeExit but in user code (for everyone who
+// doesn't care about OW compatibility) wxPrivate::OnScopeExit still works.
+
+#define wxPrivateOnScopeExit(guard) \
+ { \
+ if ( !(guard).WasDismissed() ) \
+ { \
+ wxTRY \
+ { \
+ (guard).Execute(); \
+ } \
+ wxCATCH_ALL(;) \
+ } \
+ }
+
+#define wxPrivateUse(n) wxUnusedVar(n)
+
+#else
+
+#if !defined(__GNUC__) || wxCHECK_GCC_VERSION(2, 95)
+// namespace support was first implemented in gcc-2.95,
+// so avoid using it for older versions.
namespace wxPrivate
{
+#else
+#define wxPrivate
+#endif
// in the original implementation this was a member template function of
// ScopeGuardImplBase but gcc 2.8 which is still used for OS/2 doesn't
// support member templates and so we must make it global
- template <typename ScopeGuardImpl>
+ template <class ScopeGuardImpl>
void OnScopeExit(ScopeGuardImpl& guard)
{
if ( !guard.WasDismissed() )
}
// just to avoid the warning about unused variables
- template <typename T>
+ template <class T>
void Use(const T& WXUNUSED(t))
{
}
+#if !defined(__GNUC__) || wxCHECK_GCC_VERSION(2, 95)
} // namespace wxPrivate
+#endif
+
+#define wxPrivateOnScopeExit(n) wxPrivate::OnScopeExit(n)
+#define wxPrivateUse(n) wxPrivate::Use(n)
+
+#endif
// ============================================================================
// wxScopeGuard for functions and functors
public:
wxScopeGuardImplBase() : m_wasDismissed(false) { }
+ wxScopeGuardImplBase(const wxScopeGuardImplBase& other)
+ : m_wasDismissed(other.m_wasDismissed)
+ {
+ other.Dismiss();
+ }
+
void Dismiss() const { m_wasDismissed = true; }
- // for OnScopeExit() only we can't make it friend, unfortunately)!
+ // for OnScopeExit() only (we can't make it friend, unfortunately)!
bool WasDismissed() const { return m_wasDismissed; }
protected:
~wxScopeGuardImplBase() { }
- wxScopeGuardImplBase(const wxScopeGuardImplBase& other)
- : m_wasDismissed(other.m_wasDismissed)
- {
- other.Dismiss();
- }
-
// must be mutable for copy ctor to work
mutable bool m_wasDismissed;
// wxScopeGuardImpl0: scope guard for actions without parameters
// ----------------------------------------------------------------------------
-template <typename F>
+template <class F>
class wxScopeGuardImpl0 : public wxScopeGuardImplBase
{
public:
return wxScopeGuardImpl0<F>(fun);
}
- ~wxScopeGuardImpl0() { wxPrivate::OnScopeExit(*this); }
+ ~wxScopeGuardImpl0() { wxPrivateOnScopeExit(*this); }
void Execute() { m_fun(); }
wxScopeGuardImpl0& operator=(const wxScopeGuardImpl0&);
};
-template <typename F>
+template <class F>
inline wxScopeGuardImpl0<F> wxMakeGuard(F fun)
{
return wxScopeGuardImpl0<F>::MakeGuard(fun);
// wxScopeGuardImpl1: scope guard for actions with 1 parameter
// ----------------------------------------------------------------------------
-template <typename F, typename P1>
+template <class F, class P1>
class wxScopeGuardImpl1 : public wxScopeGuardImplBase
{
public:
return wxScopeGuardImpl1<F, P1>(fun, p1);
}
- ~wxScopeGuardImpl1() { wxPrivate::OnScopeExit(*this); }
+ ~wxScopeGuardImpl1() { wxPrivateOnScopeExit(* this); }
void Execute() { m_fun(m_p1); }
wxScopeGuardImpl1& operator=(const wxScopeGuardImpl1&);
};
-template <typename F, typename P1>
+template <class F, class P1>
inline wxScopeGuardImpl1<F, P1> wxMakeGuard(F fun, P1 p1)
{
return wxScopeGuardImpl1<F, P1>::MakeGuard(fun, p1);
// wxScopeGuardImpl2: scope guard for actions with 2 parameters
// ----------------------------------------------------------------------------
-template <typename F, typename P1, typename P2>
+template <class F, class P1, class P2>
class wxScopeGuardImpl2 : public wxScopeGuardImplBase
{
public:
return wxScopeGuardImpl2<F, P1, P2>(fun, p1, p2);
}
- ~wxScopeGuardImpl2() { wxPrivate::OnScopeExit(*this); }
+ ~wxScopeGuardImpl2() { wxPrivateOnScopeExit(*this); }
void Execute() { m_fun(m_p1, m_p2); }
wxScopeGuardImpl2& operator=(const wxScopeGuardImpl2&);
};
-template <typename F, typename P1, typename P2>
+template <class F, class P1, class P2>
inline wxScopeGuardImpl2<F, P1, P2> wxMakeGuard(F fun, P1 p1, P2 p2)
{
return wxScopeGuardImpl2<F, P1, P2>::MakeGuard(fun, p1, p2);
// wxObjScopeGuardImpl0
// ----------------------------------------------------------------------------
-template <class Obj, typename MemFun>
+template <class Obj, class MemFun>
class wxObjScopeGuardImpl0 : public wxScopeGuardImplBase
{
public:
return wxObjScopeGuardImpl0<Obj, MemFun>(obj, memFun);
}
- ~wxObjScopeGuardImpl0() { wxPrivate::OnScopeExit(*this); }
+ ~wxObjScopeGuardImpl0() { wxPrivateOnScopeExit(*this); }
void Execute() { (m_obj.*m_memfun)(); }
MemFun m_memfun;
};
-template <class Obj, typename MemFun>
+template <class Obj, class MemFun>
inline wxObjScopeGuardImpl0<Obj, MemFun> wxMakeObjGuard(Obj& obj, MemFun memFun)
{
return wxObjScopeGuardImpl0<Obj, MemFun>::MakeObjGuard(obj, memFun);
}
-template <class Obj, typename MemFun, typename P1>
+template <class Obj, class MemFun, class P1>
class wxObjScopeGuardImpl1 : public wxScopeGuardImplBase
{
public:
return wxObjScopeGuardImpl1<Obj, MemFun, P1>(obj, memFun, p1);
}
- ~wxObjScopeGuardImpl1() { wxPrivate::OnScopeExit(*this); }
+ ~wxObjScopeGuardImpl1() { wxPrivateOnScopeExit(*this); }
void Execute() { (m_obj.*m_memfun)(m_p1); }
const P1 m_p1;
};
-template <class Obj, typename MemFun, typename P1>
+template <class Obj, class MemFun, class P1>
inline wxObjScopeGuardImpl1<Obj, MemFun, P1>
wxMakeObjGuard(Obj& obj, MemFun memFun, P1 p1)
{
return wxObjScopeGuardImpl1<Obj, MemFun, P1>::MakeObjGuard(obj, memFun, p1);
}
-template <class Obj, typename MemFun, typename P1, typename P2>
+template <class Obj, class MemFun, class P1, class P2>
class wxObjScopeGuardImpl2 : public wxScopeGuardImplBase
{
public:
return wxObjScopeGuardImpl2<Obj, MemFun, P1, P2>(obj, memFun, p1, p2);
}
- ~wxObjScopeGuardImpl2() { wxPrivate::OnScopeExit(*this); }
+ ~wxObjScopeGuardImpl2() { wxPrivateOnScopeExit(*this); }
void Execute() { (m_obj.*m_memfun)(m_p1, m_p2); }
const P2 m_p2;
};
-template <class Obj, typename MemFun, typename P1, typename P2>
+template <class Obj, class MemFun, class P1, class P2>
inline wxObjScopeGuardImpl2<Obj, MemFun, P1, P2>
wxMakeObjGuard(Obj& obj, MemFun memFun, P1 p1, P2 p2)
{
// but this results in compiler warnings about unused variables and I
// didn't find a way to work around this other than by having different
// macros with different names
+
+#define wxGuardName wxMAKE_UNIQUE_NAME(scopeGuard)
+
+#define wxON_BLOCK_EXIT0_IMPL(n, f) \
+ wxScopeGuard n = wxMakeGuard(f); \
+ wxPrivateUse(n)
#define wxON_BLOCK_EXIT0(f) \
- wxScopeGuard wxMAKE_UNIQUE_NAME(scopeGuard) = wxMakeGuard(f); \
- wxPrivate::Use(wxMAKE_UNIQUE_NAME(scopeGuard))
+ wxON_BLOCK_EXIT0_IMPL(wxGuardName, f)
+#define wxON_BLOCK_EXIT_OBJ0_IMPL(n, o, m) \
+ wxScopeGuard n = wxMakeObjGuard(o, m); \
+ wxPrivateUse(n)
#define wxON_BLOCK_EXIT_OBJ0(o, m) \
- wxScopeGuard wxMAKE_UNIQUE_NAME(scopeGuard) = wxMakeObjGuard(o, m); \
- wxPrivate::Use(wxMAKE_UNIQUE_NAME(scopeGuard))
+ wxON_BLOCK_EXIT_OBJ0_IMPL(wxGuardName, o, &m)
+#define wxON_BLOCK_EXIT1_IMPL(n, f, p1) \
+ wxScopeGuard n = wxMakeGuard(f, p1); \
+ wxPrivateUse(n)
#define wxON_BLOCK_EXIT1(f, p1) \
- wxScopeGuard wxMAKE_UNIQUE_NAME(scopeGuard) = wxMakeGuard(f, p1); \
- wxPrivate::Use(wxMAKE_UNIQUE_NAME(scopeGuard))
+ wxON_BLOCK_EXIT1_IMPL(wxGuardName, f, p1)
+#define wxON_BLOCK_EXIT_OBJ1_IMPL(n, o, m, p1) \
+ wxScopeGuard n = wxMakeObjGuard(o, m, p1); \
+ wxPrivateUse(n)
#define wxON_BLOCK_EXIT_OBJ1(o, m, p1) \
- wxScopeGuard wxMAKE_UNIQUE_NAME(scopeGuard) = wxMakeObjGuard(o, m, p1); \
- wxPrivate::Use(wxMAKE_UNIQUE_NAME(scopeGuard))
+ wxON_BLOCK_EXIT_OBJ1_IMPL(wxGuardName, o, &m, p1)
+#define wxON_BLOCK_EXIT2_IMPL(n, f, p1, p2) \
+ wxScopeGuard n = wxMakeGuard(f, p1, p2); \
+ wxPrivateUse(n)
#define wxON_BLOCK_EXIT2(f, p1, p2) \
- wxScopeGuard wxMAKE_UNIQUE_NAME(scopeGuard) = wxMakeGuard(f, p1, p2); \
- wxPrivate::Use(wxMAKE_UNIQUE_NAME(scopeGuard))
+ wxON_BLOCK_EXIT2_IMPL(wxGuardName, f, p1, p2)
+#define wxON_BLOCK_EXIT_OBJ2_IMPL(n, o, m, p1, p2) \
+ wxScopeGuard n = wxMakeObjGuard(o, m, p1, p2); \
+ wxPrivateUse(n)
#define wxON_BLOCK_EXIT_OBJ2(o, m, p1, p2) \
- wxScopeGuard wxMAKE_UNIQUE_NAME(scopeGuard) = wxMakeObjGuard(o, m, p1, p2); \
- wxPrivate::Use(wxMAKE_UNIQUE_NAME(scopeGuard))
+ wxON_BLOCK_EXIT_OBJ2_IMPL(wxGuardName, o, &m, p1, p2)
#endif // _WX_SCOPEGUARD_H_
-
projects / wxWidgets.git / blobdiff