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make smart_ptr.hpp usable without exceptions

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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@1569 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Lars Gullik Bjønnes 2001-02-20 13:39:03 +00:00
parent 8790e54aec
commit 1b0943f20d
1 changed files with 24 additions and 0 deletions
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24
boost/boost/smart_ptr.hpp
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@ -1,3 +1,11 @@
// Baruch Even baruch@ev-en.org 2001-02-20
// This version is a modified version for use in LyX
// The modifications are done in order to use it where exceptions are disabled
// Currently it has no "no memory" checks in place, asserts are probably the
// only real way.
// all changed are #ifded'ed by LYX_NO_EXCEPTIONS
#define LYX_NO_EXCEPTIONS
// Boost smart_ptr.hpp header file -----------------------------------------//
// (C) Copyright Greg Colvin and Beman Dawes 1998, 1999. Permission to copy,
@ -129,8 +137,12 @@ template<typename T> class shared_ptr {
typedef T element_type;
explicit shared_ptr(T* p =0) : px(p) {
#ifndef LYX_NO_EXCEPTIONS
try { pn = new long(1); } // fix: prevent leak if new throws
catch (...) { delete p; throw; }
#else
pn = new long(1);
#endif
}
shared_ptr(const shared_ptr& r) : px(r.px) { ++*(pn = r.pn); } // never throws
@ -200,12 +212,16 @@ template<typename T> class shared_ptr {
if ( px == p ) return; // fix: self-assignment safe
if (--*pn == 0) { delete px; }
else { // allocate new reference counter
#ifndef LYX_NO_EXCEPTIONS
try { pn = new long; } // fix: prevent leak if new throws
catch (...) {
++*pn; // undo effect of --*pn above to meet effects guarantee
delete p;
throw;
} // catch
#else
pn = new long;
#endif
} // allocate new reference counter
*pn = 1;
px = p;
@ -277,8 +293,12 @@ template<typename T> class shared_array {
typedef T element_type;
explicit shared_array(T* p =0) : px(p) {
#ifndef LYX_NO_EXCEPTIONS
try { pn = new long(1); } // fix: prevent leak if new throws
catch (...) { delete [] p; throw; }
#else
pn = new long(1);
#endif
}
shared_array(const shared_array& r) : px(r.px) // never throws
@ -299,12 +319,16 @@ template<typename T> class shared_array {
if ( px == p ) return; // fix: self-assignment safe
if (--*pn == 0) { delete [] px; }
else { // allocate new reference counter
#ifndef LYX_NO_EXCEPTIONS
try { pn = new long; } // fix: prevent leak if new throws
catch (...) {
++*pn; // undo effect of --*pn above to meet effects guarantee
delete [] p;
throw;
} // catch
#else
pn = new long;
#endif
} // allocate new reference counter
*pn = 1;
px = p;