diff options
Diffstat (limited to 'windows/TapDriver/mem.c')
| -rw-r--r-- | windows/TapDriver/mem.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/windows/TapDriver/mem.c b/windows/TapDriver/mem.c deleted file mode 100644 index 2f01616e..00000000 --- a/windows/TapDriver/mem.c +++ /dev/null @@ -1,186 +0,0 @@ -/* -* TAP-Windows -- A kernel driver to provide virtual tap -* device functionality on Windows. -* -* This code was inspired by the CIPE-Win32 driver by Damion K. Wilson. -* -* This source code is Copyright (C) 2002-2010 OpenVPN Technologies, Inc., -* and is released under the GPL version 2 (see below). -* -* This program is free software; you can redistribute it and/or modify -* it under the terms of the GNU General Public License version 2 -* as published by the Free Software Foundation. -* -* 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 (see the file COPYING included with this -* distribution); if not, write to the Free Software Foundation, Inc., -* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -*/ - -//------------------ -// Memory Management -//------------------ - -PVOID - MemAlloc (ULONG p_Size, BOOLEAN zero) -{ - PVOID l_Return = NULL; - - if (p_Size) - { - __try - { - if (NdisAllocateMemoryWithTag (&l_Return, p_Size, 'APAT') - == NDIS_STATUS_SUCCESS) - { - if (zero) - NdisZeroMemory (l_Return, p_Size); - } - else - l_Return = NULL; - } - __except (EXCEPTION_EXECUTE_HANDLER) - { - l_Return = NULL; - } - } - - return l_Return; -} - -VOID - MemFree (PVOID p_Addr, ULONG p_Size) -{ - if (p_Addr && p_Size) - { - __try - { -#if DBG - NdisZeroMemory (p_Addr, p_Size); -#endif - NdisFreeMemory (p_Addr, p_Size, 0); - } - __except (EXCEPTION_EXECUTE_HANDLER) - { - } - } -} - -/* -* Circular queue management routines. -*/ - -#define QUEUE_BYTE_ALLOCATION(size) \ - (sizeof (Queue) + (size * sizeof (PVOID))) - -#define QUEUE_ADD_INDEX(var, inc) \ -{ \ - var += inc; \ - if (var >= q->capacity) \ - var -= q->capacity; \ - MYASSERT (var < q->capacity); \ -} - -#define QUEUE_SANITY_CHECK() \ - MYASSERT (q != NULL && q->base < q->capacity && q->size <= q->capacity) - -#define QueueCount(q) (q->size) - -#define UPDATE_MAX_SIZE() \ -{ \ - if (q->size > q->max_size) \ - q->max_size = q->size; \ -} - -Queue * - QueueInit (ULONG capacity) -{ - Queue *q; - - MYASSERT (capacity > 0); - q = (Queue *) MemAlloc (QUEUE_BYTE_ALLOCATION (capacity), TRUE); - if (!q) - return NULL; - - q->base = q->size = 0; - q->capacity = capacity; - q->max_size = 0; - return q; -} - -VOID - QueueFree (Queue *q) -{ - if (q) - { - QUEUE_SANITY_CHECK (); - MemFree (q, QUEUE_BYTE_ALLOCATION (q->capacity)); - } -} - -PVOID - QueuePush (Queue *q, PVOID item) -{ - ULONG dest; - QUEUE_SANITY_CHECK (); - if (q->size == q->capacity) - return NULL; - dest = q->base; - QUEUE_ADD_INDEX (dest, q->size); - q->data[dest] = item; - ++q->size; - UPDATE_MAX_SIZE(); - return item; -} - -PVOID - QueuePop (Queue *q) -{ - ULONG oldbase; - QUEUE_SANITY_CHECK (); - if (!q->size) - return NULL; - oldbase = q->base; - QUEUE_ADD_INDEX (q->base, 1); - --q->size; - UPDATE_MAX_SIZE(); - return q->data[oldbase]; -} - -PVOID - QueueExtract (Queue *q, PVOID item) -{ - ULONG src, dest, count, n; - QUEUE_SANITY_CHECK (); - n = 0; - src = dest = q->base; - count = q->size; - while (count--) - { - if (item == q->data[src]) - { - ++n; - --q->size; - } - else - { - q->data[dest] = q->data[src]; - QUEUE_ADD_INDEX (dest, 1); - } - QUEUE_ADD_INDEX (src, 1); - } - if (n) - return item; - else - return NULL; -} - -#undef QUEUE_BYTE_ALLOCATION -#undef QUEUE_ADD_INDEX -#undef QUEUE_SANITY_CHECK -#undef UPDATE_MAX_SIZE |