| // Copyright (C) 1999-2005 Open Source Telecom Corporation. |
| // Copyright (C) 2006-2010 David Sugar, Tycho Softworks. |
| // |
| // This program is free software; you can redistribute it and/or modify |
| // it under the terms of the GNU General Public License as published by |
| // the Free Software Foundation; either version 2 of the License, or |
| // (at your option) any later version. |
| // |
| // This program is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| // |
| // You should have received a copy of the GNU General Public License |
| // along with this program; if not, write to the Free Software |
| // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| // |
| // As a special exception, you may use this file as part of a free software |
| // library without restriction. Specifically, if other files instantiate |
| // templates or use macros or inline functions from this file, or you compile |
| // this file and link it with other files to produce an executable, this |
| // file does not by itself cause the resulting executable to be covered by |
| // the GNU General Public License. This exception does not however |
| // invalidate any other reasons why the executable file might be covered by |
| // the GNU General Public License. |
| // |
| // This exception applies only to the code released under the name GNU |
| // Common C++. If you copy code from other releases into a copy of GNU |
| // Common C++, as the General Public License permits, the exception does |
| // not apply to the code that you add in this way. To avoid misleading |
| // anyone as to the status of such modified files, you must delete |
| // this exception notice from them. |
| // |
| // If you write modifications of your own for GNU Common C++, it is your choice |
| // whether to permit this exception to apply to your modifications. |
| // If you do not wish that, delete this exception notice. |
| // |
| |
| #include <cc++/config.h> |
| #include <cc++/export.h> |
| #include <cc++/slog.h> |
| #include <cc++/thread.h> |
| #include <cc++/misc.h> |
| #include <cstdlib> |
| #include "private.h" |
| |
| #ifdef CCXX_NAMESPACES |
| namespace ost { |
| using std::endl; |
| #endif |
| |
| const static size_t palign = __BYTE_ALIGNMENT; |
| |
| #if defined(HAVE_POSIX_MEMALIGN) && __BYTE_ALIGNMENT < 2 |
| #undef HAVE_POSIX_MEMALIGN |
| #endif |
| |
| #ifdef HAVE_POSIX_MEMALIGN |
| static volatile size_t malign = 0; |
| #endif |
| |
| MemPager::MemPager(size_t pg) |
| { |
| pagesize = ((pg + sizeof(void *) - 1) / sizeof(void *)) * sizeof(void *); |
| pages = 1; |
| |
| #ifdef COMMON_MEMORY_AUDIT |
| slog(Slog::levelDebug) << "MemPager: creating pool, id=" << this << endl; |
| slog(Slog::levelDebug) << "MemPager: alloc, id=" |
| << this << " page=" << page << endl; |
| #endif |
| #if defined(HAVE_POSIX_MEMALIGN) |
| unsigned p2 = 2; |
| if(!malign) { |
| while(p2 < sizeof(void *)) |
| p2 *= 2; |
| while(((p2 / sizeof(void *)) * sizeof(void *)) != p2) |
| p2 *= 2; |
| malign = p2; |
| } |
| posix_memalign((void **)&page, malign, pagesize); |
| #else |
| page = (struct _page *)::new void *[pagesize / sizeof(void *)]; |
| #endif |
| page->next = NULL; |
| page->used = sizeof(struct _page); |
| } |
| |
| MemPager::~MemPager() |
| { |
| clean(); |
| } |
| |
| void MemPager::clean(void) |
| { |
| struct _page *root = page; |
| |
| while(root) { |
| page = page->next; |
| #ifdef COMMON_MEMORY_AUDIT |
| slog(Slog::levelDebug) << "MemPager: delete, id=" |
| << this << " page=" << root << endl; |
| #endif |
| #ifdef HAVE_POSIX_MEMALIGN |
| ::free(root); |
| #else |
| delete[] root; |
| #endif |
| root = page; |
| } |
| #ifdef COMMON_MEMORY_AUDIT |
| slog(Slog::levelDebug) << "Mempager: destroy pool, id=" << this << endl; |
| #endif |
| } |
| |
| void MemPager::purge(void) |
| { |
| struct _page *root = page; |
| |
| while(root->next) { |
| page = root->next; |
| #ifdef COMMON_MEMORY_AUDIT |
| slog(Slog::levelDebug) << "Mempager: delete, id=" |
| << this << " page=" << root << endl; |
| #endif |
| #ifdef HAVE_POSIX_MEMALIGN |
| ::free(root); |
| #else |
| delete[] root; |
| #endif |
| --pages; |
| root = page; |
| } |
| page->used = sizeof(struct _page); |
| } |
| |
| |
| void *MemPager::alloc(size_t size) |
| { |
| char *ptr; |
| struct _page *npage; |
| |
| #if __BYTE_ALIGNMENT > 1 |
| size_t align = size % palign; |
| if (align) |
| size += palign - align; |
| #endif |
| |
| if(size > pagesize - sizeof(struct _page)) { |
| slog.critical("mempager overflow"); |
| #ifdef CCXX_EXCEPTIONS |
| if(Thread::getException() == Thread::throwObject) |
| throw this; |
| #ifdef COMMON_STD_EXCEPTION |
| else if(Thread;:getException() == Thread::throwException) |
| Throw Exception("Mempager::alloc(): Memory Overflow"); |
| #endif |
| #else |
| abort(); |
| #endif |
| } |
| |
| if(page->used + size > pagesize) { |
| #if defined(HAVE_POSIX_MEMALIGN) |
| posix_memalign((void **)&npage, malign, pagesize); |
| #else |
| npage = (struct _page *) ::new void *[pagesize / sizeof(void *)]; |
| #endif |
| |
| #ifdef COMMON_MEMORY_AUDIT |
| slog(Slog::levelDebug) << "MemPager: alloc, id=" |
| << this << " page=" << npage << endl; |
| #endif |
| npage->next = page; |
| npage->used = sizeof(struct _page); |
| page = npage; |
| ++pages; |
| } |
| ptr = (char *)page; |
| ptr += page->used; |
| page->used += size; |
| return (void *)ptr; |
| } |
| |
| void *MemPager::first(size_t size) |
| { |
| struct _page *npage = page; |
| char *ptr; |
| |
| #if __BYTE_ALIGNMENT > 1 |
| size_t align = size % palign; |
| |
| if (align) |
| size += palign - align; |
| #endif |
| |
| while(npage) { |
| if(npage->used + size <= pagesize) |
| break; |
| |
| npage = npage->next; |
| } |
| if(!npage) |
| return alloc(size); |
| |
| ptr = (char *)npage; |
| ptr += npage->used; |
| npage->used += size; |
| return (void *)ptr; |
| } |
| |
| char *MemPager::alloc(const char *str) |
| { |
| size_t len = strlen(str) + 1; |
| char *cp = (char *)alloc(len); |
| return setString(cp, len, str); |
| } |
| |
| char *MemPager::first(char *str) |
| { |
| size_t len = strlen(str) + 1; |
| char *cp = (char *)first(len); |
| return setString(cp, len, str); |
| } |
| |
| StackPager::StackPager(size_t pg) : |
| MemPager(pg) |
| { |
| stack = NULL; |
| } |
| |
| void StackPager::purge(void) |
| { |
| MemPager::purge(); |
| stack = NULL; |
| } |
| |
| void *StackPager::pull(void) |
| { |
| frame_t *object = stack; |
| |
| if(!stack) { |
| purge(); |
| return NULL; |
| } |
| |
| stack = object->next; |
| return object->data; |
| } |
| |
| void *StackPager::push(const void* object, size_t len) |
| { |
| frame_t *frame = (frame_t *)alloc(len + sizeof(frame_t) - 1); |
| |
| if(!frame) |
| return NULL; |
| |
| frame->next = stack; |
| stack = frame; |
| memcpy(frame->data, object, len); |
| return (void *)frame->data; |
| } |
| |
| void *StackPager::push(const char *string) |
| { |
| return push(string, strlen(string) + 1); |
| } |
| |
| SharedMemPager::SharedMemPager(size_t pg, const char *name) : |
| MemPager(pg), Mutex(name) |
| {} |
| |
| void SharedMemPager::purge(void) |
| { |
| enterMutex(); |
| MemPager::purge(); |
| leaveMutex(); |
| } |
| |
| void *SharedMemPager::first(size_t size) |
| { |
| void *mem; |
| |
| enterMutex(); |
| mem = MemPager::first(size); |
| leaveMutex(); |
| return mem; |
| } |
| |
| void *SharedMemPager::alloc(size_t size) |
| { |
| void *mem; |
| |
| enterMutex(); |
| mem = MemPager::alloc(size); |
| leaveMutex(); |
| return mem; |
| } |
| |
| #ifdef CCXX_NAMESPACES |
| } |
| #endif |
| |
| /** EMACS ** |
| * Local variables: |
| * mode: c++ |
| * c-basic-offset: 4 |
| * End: |
| */ |