octave: liboctave/util/unwind-prot.h comparison

comparison liboctave/util/unwind-prot.h @ 31607:aac27ad79be6 stable

maint: Re-indent code after switch to using namespace macros. * build-env.h, build-env.in.cc, Cell.h, __betainc__.cc, __eigs__.cc, __ftp__.cc, __ichol__.cc, __ilu__.cc, __isprimelarge__.cc, __magick_read__.cc, __pchip_deriv__.cc, amd.cc, base-text-renderer.cc, base-text-renderer.h, besselj.cc, bitfcns.cc, bsxfun.cc, c-file-ptr-stream.h, call-stack.cc, call-stack.h, ccolamd.cc, cellfun.cc, chol.cc, colamd.cc, dasrt.cc, data.cc, debug.cc, defaults.cc, defaults.h, det.cc, display.cc, display.h, dlmread.cc, dynamic-ld.cc, dynamic-ld.h, ellipj.cc, environment.cc, environment.h, error.cc, error.h, errwarn.h, event-manager.cc, event-manager.h, event-queue.cc, event-queue.h, fcn-info.cc, fcn-info.h, fft.cc, fft2.cc, file-io.cc, filter.cc, find.cc, ft-text-renderer.cc, ft-text-renderer.h, gcd.cc, gl-render.cc, gl-render.h, gl2ps-print.cc, gl2ps-print.h, graphics-toolkit.cc, graphics-toolkit.h, graphics.cc, gsvd.cc, gtk-manager.cc, gtk-manager.h, help.cc, help.h, hook-fcn.cc, hook-fcn.h, input.cc, input.h, interpreter-private.cc, interpreter-private.h, interpreter.cc, interpreter.h, inv.cc, jsondecode.cc, jsonencode.cc, latex-text-renderer.cc, latex-text-renderer.h, load-path.cc, load-path.h, load-save.cc, load-save.h, lookup.cc, ls-hdf5.cc, ls-mat4.cc, ls-mat5.cc, lsode.cc, lu.cc, mappers.cc, matrix_type.cc, max.cc, mex.cc, mexproto.h, mxarray.h, mxtypes.in.h, oct-errno.in.cc, oct-hdf5-types.cc, oct-hist.cc, oct-hist.h, oct-map.cc, oct-map.h, oct-opengl.h, oct-prcstrm.h, oct-process.cc, oct-process.h, oct-stdstrm.h, oct-stream.cc, oct-stream.h, oct-strstrm.h, octave-default-image.h, ordqz.cc, ordschur.cc, pager.cc, pager.h, pinv.cc, pow2.cc, pr-output.cc, psi.cc, qr.cc, quadcc.cc, rand.cc, regexp.cc, settings.cc, settings.h, sighandlers.cc, sighandlers.h, sparse-xpow.cc, sqrtm.cc, stack-frame.cc, stack-frame.h, stream-euler.cc, strfns.cc, svd.cc, syminfo.cc, syminfo.h, symrcm.cc, symrec.cc, symrec.h, symscope.cc, symscope.h, symtab.cc, symtab.h, sysdep.cc, sysdep.h, text-engine.cc, text-engine.h, text-renderer.cc, text-renderer.h, time.cc, toplev.cc, typecast.cc, url-handle-manager.cc, url-handle-manager.h, urlwrite.cc, utils.cc, utils.h, variables.cc, variables.h, xdiv.cc, __delaunayn__.cc, __init_fltk__.cc, __init_gnuplot__.cc, __ode15__.cc, __voronoi__.cc, audioread.cc, convhulln.cc, gzip.cc, cdef-class.cc, cdef-class.h, cdef-fwd.h, cdef-manager.cc, cdef-manager.h, cdef-method.cc, cdef-method.h, cdef-object.cc, cdef-object.h, cdef-package.cc, cdef-package.h, cdef-property.cc, cdef-property.h, cdef-utils.cc, cdef-utils.h, ov-base-diag.cc, ov-base-int.cc, ov-base-mat.cc, ov-base-mat.h, ov-base-scalar.cc, ov-base.cc, ov-base.h, ov-bool-mat.cc, ov-bool-mat.h, ov-bool-sparse.cc, ov-bool.cc, ov-builtin.h, ov-cell.cc, ov-ch-mat.cc, ov-class.cc, ov-class.h, ov-classdef.cc, ov-classdef.h, ov-complex.cc, ov-cx-diag.cc, ov-cx-mat.cc, ov-cx-sparse.cc, ov-dld-fcn.cc, ov-dld-fcn.h, ov-fcn-handle.cc, ov-fcn-handle.h, ov-fcn.h, ov-float.cc, ov-flt-complex.cc, ov-flt-cx-diag.cc, ov-flt-cx-mat.cc, ov-flt-re-diag.cc, ov-flt-re-mat.cc, ov-flt-re-mat.h, ov-intx.h, ov-java.cc, ov-lazy-idx.cc, ov-legacy-range.cc, ov-magic-int.cc, ov-mex-fcn.cc, ov-mex-fcn.h, ov-null-mat.cc, ov-perm.cc, ov-range.cc, ov-re-diag.cc, ov-re-mat.cc, ov-re-mat.h, ov-re-sparse.cc, ov-scalar.cc, ov-str-mat.cc, ov-struct.cc, ov-typeinfo.cc, ov-typeinfo.h, ov-usr-fcn.cc, ov-usr-fcn.h, ov.cc, ov.h, ovl.h, octave.cc, octave.h, op-b-sbm.cc, op-bm-sbm.cc, op-cs-scm.cc, op-fm-fcm.cc, op-fs-fcm.cc, op-s-scm.cc, op-scm-cs.cc, op-scm-s.cc, op-sm-cs.cc, ops.h, anon-fcn-validator.cc, anon-fcn-validator.h, bp-table.cc, bp-table.h, comment-list.cc, comment-list.h, filepos.h, lex.h, oct-lvalue.cc, oct-lvalue.h, parse.h, profiler.cc, profiler.h, pt-anon-scopes.cc, pt-anon-scopes.h, pt-arg-list.cc, pt-arg-list.h, pt-args-block.cc, pt-args-block.h, pt-array-list.cc, pt-array-list.h, pt-assign.cc, pt-assign.h, pt-binop.cc, pt-binop.h, pt-bp.cc, pt-bp.h, pt-cbinop.cc, pt-cbinop.h, pt-cell.cc, pt-cell.h, pt-check.cc, pt-check.h, pt-classdef.cc, pt-classdef.h, pt-cmd.h, pt-colon.cc, pt-colon.h, pt-const.cc, pt-const.h, pt-decl.cc, pt-decl.h, pt-eval.cc, pt-eval.h, pt-except.cc, pt-except.h, pt-exp.cc, pt-exp.h, pt-fcn-handle.cc, pt-fcn-handle.h, pt-id.cc, pt-id.h, pt-idx.cc, pt-idx.h, pt-jump.h, pt-loop.cc, pt-loop.h, pt-mat.cc, pt-mat.h, pt-misc.cc, pt-misc.h, pt-pr-code.cc, pt-pr-code.h, pt-select.cc, pt-select.h, pt-spmd.cc, pt-spmd.h, pt-stmt.cc, pt-stmt.h, pt-tm-const.cc, pt-tm-const.h, pt-unop.cc, pt-unop.h, pt-walk.cc, pt-walk.h, pt.cc, pt.h, token.cc, token.h, Range.cc, Range.h, idx-vector.cc, idx-vector.h, range-fwd.h, CollocWt.cc, CollocWt.h, aepbalance.cc, aepbalance.h, chol.cc, chol.h, gepbalance.cc, gepbalance.h, gsvd.cc, gsvd.h, hess.cc, hess.h, lo-mappers.cc, lo-mappers.h, lo-specfun.cc, lo-specfun.h, lu.cc, lu.h, oct-convn.cc, oct-convn.h, oct-fftw.cc, oct-fftw.h, oct-norm.cc, oct-norm.h, oct-rand.cc, oct-rand.h, oct-spparms.cc, oct-spparms.h, qr.cc, qr.h, qrp.cc, qrp.h, randgamma.cc, randgamma.h, randmtzig.cc, randmtzig.h, randpoisson.cc, randpoisson.h, schur.cc, schur.h, sparse-chol.cc, sparse-chol.h, sparse-lu.cc, sparse-lu.h, sparse-qr.cc, sparse-qr.h, svd.cc, svd.h, child-list.cc, child-list.h, dir-ops.cc, dir-ops.h, file-ops.cc, file-ops.h, file-stat.cc, file-stat.h, lo-sysdep.cc, lo-sysdep.h, lo-sysinfo.cc, lo-sysinfo.h, mach-info.cc, mach-info.h, oct-env.cc, oct-env.h, oct-group.cc, oct-group.h, oct-password.cc, oct-password.h, oct-syscalls.cc, oct-syscalls.h, oct-time.cc, oct-time.h, oct-uname.cc, oct-uname.h, action-container.cc, action-container.h, base-list.h, cmd-edit.cc, cmd-edit.h, cmd-hist.cc, cmd-hist.h, f77-fcn.h, file-info.cc, file-info.h, lo-array-errwarn.cc, lo-array-errwarn.h, lo-hash.cc, lo-hash.h, lo-ieee.h, lo-regexp.cc, lo-regexp.h, lo-utils.cc, lo-utils.h, oct-base64.cc, oct-base64.h, oct-glob.cc, oct-glob.h, oct-inttypes.h, oct-mutex.cc, oct-mutex.h, oct-refcount.h, oct-shlib.cc, oct-shlib.h, oct-sparse.cc, oct-sparse.h, oct-string.h, octave-preserve-stream-state.h, pathsearch.cc, pathsearch.h, quit.cc, quit.h, unwind-prot.cc, unwind-prot.h, url-transfer.cc, url-transfer.h: Re-indent code after switch to using namespace macros.

author	Rik <rik@octave.org>
date	Thu, 01 Dec 2022 18:02:15 -0800
parents	e88a07dec498
children	597f3ee61a48

comparison

equal deleted inserted replaced

-:e88a07dec498
+:aac27ad79be6
 #include "action-container.h"
 OCTAVE_BEGIN_NAMESPACE(octave)
 class
 OCTAVE_API
 unwind_protect : public action_container
 {
 public:
 unwind_protect (void) : m_lifo () { }
 // No copying!
 unwind_protect (const unwind_protect&) = delete;
 unwind_protect& operator = (const unwind_protect&) = delete;
 // Destructor should not raise an exception, so all actions
 // registered should be exception-safe.  If you're not sure, see
 // unwind_protect_safe.
 ~unwind_protect (void) { run (); }
 operator bool (void) const { return ! empty (); }
 void run_first (void)
 {
 if (! empty ())
 {
 // No leak on exception!
 std::unique_ptr<elem> ptr (m_lifo.top ());
 m_lifo.pop ();
 ptr->run ();
 }
 }
 void discard_first (void)
 {
 if (! empty ())
 {
 elem *ptr = m_lifo.top ();
 m_lifo.pop ();
 delete ptr;
 }
 }
 std::size_t size (void) const { return m_lifo.size (); }
 protected:
 virtual void add_action (elem *new_elem)
 {
 m_lifo.push (new_elem);
 }
 std::stack<elem *> m_lifo;
 };
 // Like unwind_protect, but this one will guard against the possibility
 // of seeing an exception (or interrupt) in the cleanup actions.
 // Not that we can do much about it, but at least we won't crash.
 class
 OCTAVE_API
 unwind_protect_safe : public unwind_protect
 {
 private:
 void warn_unhandled_exception (void) const;
 public:
 unwind_protect_safe (void) : unwind_protect () { }
 // No copying!
 unwind_protect_safe (const unwind_protect_safe&) = delete;
 unwind_protect_safe& operator = (const unwind_protect_safe&) = delete;
 ~unwind_protect_safe (void)
 {
 while (! empty ())
 {
 try
 {
 run_first ();
 }
 catch (...) // Yes, the black hole.  Remember we're in a destructor.
 {
 warn_unhandled_exception ();
 }
 }
 }
 };
 // In most cases, the following are preferred for efficiency.  Some
 // cases may require the flexibility of the general unwind_protect
 // mechanism defined above.
 // Perform action at end of the current scope when unwind_action
 // object destructor is called.
 //
 // For example:
 //
 //   void fcn (int val) { ... }
 //
 // ...
 //
 //   {
 //     int val = 42;
 //
 //     // template parameters, std::bind and std::function provide
 //     // flexibility in calling forms (function pointer or lambda):
 //
 //     unwind_action act1 (fcn, val);
 //     unwind_action act2 ([val] (void) { fcn (val); });
 //   }
 //
 // NOTE: Don't forget to provide a name for the unwind_action
 // variable.  If you write
 //
 //   unwind_action /* NO NAME! */ (...);
 //
 // then the destructor for the temporary anonymous object will be
 // called immediately after the object is constructed instead of at
 // the end of the current scope.
 class OCTAVE_API unwind_action
 {
 public:
 unwind_action (void) : m_fcn () { }
 // FIXME: Do we need to apply std::forward to the arguments to
 // std::bind here?
 template <typename F, typename... Args>
-unwind_action (F&& fcn, Args&&... args)
+unwind_action (F&& fcn, Args&& ... args)
 : m_fcn (std::bind (fcn, args...))
 { }
 // No copying!
 unwind_action (const unwind_action&) = delete;
 unwind_action& operator = (const unwind_action&) = delete;
 ~unwind_action (void) { run (); }
 // FIXME: Do we need to apply std::forward to the arguments to
 // std::bind here?
 template <typename F, typename... Args>
-void set (F&& fcn, Args&&... args)
+void set (F&& fcn, Args&& ... args)
 {
 m_fcn = std::bind (fcn, args...);
 }
 void set (void) { m_fcn = nullptr; }
 // Alias for set() which is clearer about programmer intention.
 void discard (void) { set (); }
 void run (void)
 {
 if (m_fcn)
 m_fcn ();
 // Invalidate so action won't run again when object is deleted.
 discard ();
 }
 private:
 std::function<void (void)> m_fcn;
 };
 // Like unwind_action, but this one will guard against the possibility
 // of seeing an exception (or interrupt) in the cleanup actions.
 // Not that we can do much about it, but at least we won't crash.
 class OCTAVE_API unwind_action_safe
 {
 private:
 void warn_unhandled_exception (void) const;
 public:
 unwind_action_safe (void) : m_fcn () { }
 // FIXME: Do we need to apply std::forward to the arguments to
 // std::bind here?
 template <typename F, typename... Args>
-unwind_action_safe (F&& fcn, Args&&... args)
+unwind_action_safe (F&& fcn, Args&& ... args)
 : m_fcn (std::bind (fcn, args...))
 { }
 // No copying!
 unwind_action_safe (const unwind_action_safe&) = delete;
 unwind_action_safe& operator = (const unwind_action_safe&) = delete;
 ~unwind_action_safe (void) { run (); }
 // FIXME: Do we need to apply std::forward to the arguments to
 // std::bind here?
 template <typename F, typename... Args>
-void set (F&& fcn, Args&&... args)
+void set (F&& fcn, Args&& ... args)
 {
 m_fcn = std::bind (fcn, args...);
 }
 void set (void) { m_fcn = nullptr; }
 // Alias for set() which is clearer about programmer intention.
 void discard (void) { set (); }
 void run (void)
 {
 try
 {
 if (m_fcn)
 m_fcn ();
 }
 catch (...) // Yes, the black hole.  Remember we're in a destructor.
 {
 warn_unhandled_exception ();
 }
 // Invalidate so action won't run again when object is deleted.
 discard ();
 }
 private:
 std::function<void (void)> m_fcn;
 };
 // Reset a variable value at the end of the current scope when
 // unwind_protect_var object destructor is called.
 //
 // For example:
 //
 //   {
 //     int x = 42;
 //     unwind_protect_var<int> upv (x);  // X will be reset at end of scope
 //     x = 13;                           // Set temporary value.
 //   }
 //
 // Temporary value may be set at construction:
 //
 //   {
 //     int x = ...;
 //     unwind_protect_var<int> upv (x, 13);  // X will be reset.
 //                                           // temporary value is 13.
 //   }
 //
 // NOTE: Don't forget to provide a name for the unwind_protect_var
 // variable.  If you write
 //
 //   unwind_protect_var<type> /* NO NAME! */ (...);
 //
 // then the destructor for the temporary anonymous object will be
 // called immediately after the object is constructed instead of at
 // the end of the current scope.
 //
 // FIXME: Once we are able to use C++17, class template argument
 // deduction will allow us to omit the explicit template type from the
 // constructor expression:
 //
 //   unwind_protect_var upv (...);
 template <typename T>
 class unwind_protect_var
 {
 public:
 // Ensure that the value referenced by REF will be reset when this
 // unwind_protect_var object goes out of scope.
 explicit unwind_protect_var (T& ref)
 : m_ref (ref), m_val (ref)
 { }
 // Set the value referenced by REF to NEW_VAL and ensure that it
 // will be reset to its original value when this
 // unwind_protect_var object goes out of scope.
 unwind_protect_var (T& ref, const T& new_val)
 : m_ref (ref), m_val (ref)
 {
 m_ref = new_val;
 }
 // No copying!
 unwind_protect_var (const unwind_protect_var&) = delete;
 unwind_protect_var& operator = (const unwind_protect_var&) = delete;
 ~unwind_protect_var (void)
 {
 m_ref = m_val;
 }
 private:
 T& m_ref;
 T m_val;
 };
 OCTAVE_END_NAMESPACE(octave)
 #endif

Mercurial > octave

comparison liboctave/util/unwind-prot.h @ 31607:aac27ad79be6 stable