Mercurial > hg > octave-nkf
annotate liboctave/util/oct-alloc.cc @ 16660:cbb1bb7a5c3d
Added tag ss-3-7-5 for changeset 608e307b4914
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Tue, 14 May 2013 05:23:53 -0400 |
| parents | 648dabbb4c6b |
| children | d63878346099 |
| rev | line source |
|---|---|
| 2475 | 1 /* |
| 2 | |
|
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3 Copyright (C) 1996-2012 John W. Eaton |
| 2475 | 4 |
| 5 This file is part of Octave. | |
| 6 | |
| 7 Octave is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
| 10 option) any later version. | |
| 2475 | 11 |
| 12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 7016 | 18 along with Octave; see the file COPYING. If not, see |
| 19 <http://www.gnu.org/licenses/>. | |
| 2475 | 20 |
| 21 */ | |
| 22 | |
| 23 #ifdef HAVE_CONFIG_H | |
| 24 #include <config.h> | |
| 25 #endif | |
| 26 | |
| 27 #include <new> | |
| 28 | |
| 29 #include "oct-alloc.h" | |
| 30 | |
| 31 void * | |
| 32 octave_allocator::alloc (size_t size) | |
| 33 { | |
| 34 if (size != item_size) | |
|
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35 return ::new char [size]; |
| 2475 | 36 |
| 37 if (! head) | |
| 38 { | |
| 39 if (! grow ()) | |
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40 return 0; |
| 2475 | 41 } |
| 42 | |
| 43 link *tmp = head; | |
| 44 head = head->next; | |
| 45 return tmp; | |
| 46 } | |
| 47 | |
| 5775 | 48 // FIXME -- if we free the last item on the list, shouldn't we |
| 5013 | 49 // also free the underlying character array used for storage? |
| 50 | |
| 2475 | 51 void |
| 52 octave_allocator::free (void *p, size_t size) | |
| 53 { | |
| 54 if (size != item_size) | |
| 2800 | 55 ::delete [] (static_cast<char *> (p)); |
| 2475 | 56 else |
| 57 { | |
| 2800 | 58 link *tmp = static_cast<link *> (p); |
| 2475 | 59 tmp->next = head; |
| 60 head = tmp; | |
| 61 } | |
| 62 } | |
| 63 | |
| 64 // Return TRUE for successful allocation, FALSE otherwise. | |
| 65 | |
| 66 bool | |
| 67 octave_allocator::grow (void) | |
| 68 { | |
| 69 bool retval = true; | |
| 70 | |
| 71 char *start = new char [grow_size * item_size]; | |
| 72 | |
| 73 if (start) | |
| 74 { | |
| 75 char *last = &start[(grow_size - 1) * item_size]; | |
| 76 | |
| 77 char *p = start; | |
| 78 while (p < last) | |
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parents:
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79 { |
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80 char *next = p + item_size; |
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81 (reinterpret_cast<link *> (p)) -> next |
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82 = reinterpret_cast<link *> (next); |
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83 p = next; |
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untabify liboctave C++ sources
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parents:
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84 } |
| 2475 | 85 |
| 5760 | 86 (reinterpret_cast<link *> (last)) -> next = 0; |
| 2475 | 87 |
| 5760 | 88 head = reinterpret_cast<link *> (start); |
| 2475 | 89 } |
| 90 else | |
| 91 { | |
| 92 typedef void (*error_handler_function) (void); | |
| 93 | |
| 3503 | 94 error_handler_function f = std::set_new_handler (0); |
| 95 std::set_new_handler (f); | |
| 2475 | 96 |
| 97 if (f) | |
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98 f (); |
| 2475 | 99 |
| 100 retval = false; | |
| 101 } | |
| 102 | |
| 103 return retval; | |
| 104 } |