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/*********************************************************
* Copyright (C) 2006 VMware, Inc. All rights reserved.
*
* 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 version 2 and no 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.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*********************************************************/
/*
* vmci_handle_array.h --
*
* Simple dynamic array.
*/
#ifndef _VMCI_HANDLE_ARRAY_H_
#define _VMCI_HANDLE_ARRAY_H_
#define INCLUDE_ALLOW_VMMON
#define INCLUDE_ALLOW_MODULE
#define INCLUDE_ALLOW_VMCORE
#define INCLUDE_ALLOW_VMKERNEL
#include "includeCheck.h"
#include "vmci_kernel_if.h"
#include "vmware.h"
#include "vmci_defs.h"
#include "vm_assert.h"
#ifdef VMKERNEL
#include "vm_libc.h"
#endif // VMKERNEL
#define VMCI_HANDLE_ARRAY_DEFAULT_SIZE 4
typedef struct VMCIHandleArray {
uint32 capacity;
uint32 size;
VMCIHandle entries[1];
} VMCIHandleArray;
/*
*-----------------------------------------------------------------------------------
*
* VMCIHandleArray_Create --
*
* Results:
* Array if successful, NULL if not.
*
* Side effects:
* None.
*
*-----------------------------------------------------------------------------------
*/
static INLINE VMCIHandleArray *
VMCIHandleArray_Create(uint32 capacity)
{
VMCIHandleArray *array;
if (capacity == 0) {
capacity = VMCI_HANDLE_ARRAY_DEFAULT_SIZE;
}
array = (VMCIHandleArray *)VMCI_AllocKernelMem(sizeof array->capacity +
sizeof array->size +
capacity * sizeof(VMCIHandle),
VMCI_MEMORY_NONPAGED |
VMCI_MEMORY_ATOMIC);
if (array == NULL) {
return NULL;
}
array->capacity = capacity;
array->size = 0;
return array;
}
/*
*-----------------------------------------------------------------------------------
*
* VMCIHandleArray_Destroy --
*
* Results:
* None.
*
* Side effects:
* None.
*
*-----------------------------------------------------------------------------------
*/
static INLINE void
VMCIHandleArray_Destroy(VMCIHandleArray *array)
{
VMCI_FreeKernelMem(array,
sizeof array->capacity + sizeof array->size +
array->capacity * sizeof(VMCIHandle));
}
/*
*-----------------------------------------------------------------------------------
*
* VMCIHandleArray_AppendEntry --
*
* Results:
* None.
*
* Side effects:
* Array may be reallocated.
*
*-----------------------------------------------------------------------------------
*/
static INLINE void
VMCIHandleArray_AppendEntry(VMCIHandleArray **arrayPtr,
VMCIHandle handle)
{
VMCIHandleArray *array;
ASSERT(arrayPtr && *arrayPtr);
array = *arrayPtr;
if (UNLIKELY(array->size >= array->capacity)) {
/* reallocate. */
uint32 arraySize = sizeof array->capacity + sizeof array->size +
array->capacity * sizeof(VMCIHandle);
VMCIHandleArray *newArray = (VMCIHandleArray *)
VMCI_AllocKernelMem(arraySize + array->capacity * sizeof(VMCIHandle),
VMCI_MEMORY_NONPAGED | VMCI_MEMORY_ATOMIC);
if (newArray == NULL) {
return;
}
memcpy(newArray, array, arraySize);
newArray->capacity *= 2;
VMCI_FreeKernelMem(array, arraySize);
*arrayPtr = newArray;
array = newArray;
}
array->entries[array->size] = handle;
array->size++;
}
/*
*-----------------------------------------------------------------------------------
*
* VMCIHandleArray_RemoveEntry --
*
* Results:
* Handle that was removed, VMCI_INVALID_HANDLE if entry not found.
*
* Side effects:
* None.
*
*-----------------------------------------------------------------------------------
*/
static INLINE VMCIHandle
VMCIHandleArray_RemoveEntry(VMCIHandleArray *array,
VMCIHandle entryHandle)
{
uint32 i;
VMCIHandle handle = VMCI_INVALID_HANDLE;
ASSERT(array);
for (i = 0; i < array->size; i++) {
if (VMCI_HANDLE_EQUAL(array->entries[i], entryHandle)) {
handle = array->entries[i];
array->entries[i] = array->entries[array->size-1];
array->entries[array->size-1] = VMCI_INVALID_HANDLE;
array->size--;
break;
}
}
return handle;
}
/*
*-----------------------------------------------------------------------------------
*
* VMCIHandleArray_RemoveTail --
*
* Results:
* Handle that was removed, VMCI_INVALID_HANDLE if array was empty.
*
* Side effects:
* None.
*
*-----------------------------------------------------------------------------------
*/
static INLINE VMCIHandle
VMCIHandleArray_RemoveTail(VMCIHandleArray *array)
{
VMCIHandle handle;
if (array->size == 0) {
return VMCI_INVALID_HANDLE;
}
handle = array->entries[array->size-1];
array->entries[array->size-1] = VMCI_INVALID_HANDLE;
array->size--;
return handle;
}
/*
*-----------------------------------------------------------------------------------
*
* VMCIHandleArray_GetEntry --
*
* Results:
* Handle at given index, VMCI_INVALID_HANDLE if invalid index.
*
* Side effects:
* None.
*
*-----------------------------------------------------------------------------------
*/
static INLINE VMCIHandle
VMCIHandleArray_GetEntry(const VMCIHandleArray *array,
uint32 index)
{
ASSERT(array);
if (UNLIKELY(index >= array->size)) {
return VMCI_INVALID_HANDLE;
}
return array->entries[index];
}
/*
*-----------------------------------------------------------------------------------
*
* VMCIHandleArray_GetSize --
*
* Results:
* Number of entries in array.
*
* Side effects:
* None.
*
*-----------------------------------------------------------------------------------
*/
static INLINE uint32
VMCIHandleArray_GetSize(const VMCIHandleArray *array)
{
ASSERT(array);
return array->size;
}
/*
*-----------------------------------------------------------------------------------
*
* VMCIHandleArray_HasEntry --
*
* Results:
* TRUE is entry exists in array, FALSE if not.
*
* Side effects:
* None.
*
*-----------------------------------------------------------------------------------
*/
static INLINE Bool
VMCIHandleArray_HasEntry(const VMCIHandleArray *array,
VMCIHandle entryHandle)
{
uint32 i;
ASSERT(array);
for (i = 0; i < array->size; i++) {
if (VMCI_HANDLE_EQUAL(array->entries[i], entryHandle)) {
return TRUE;
}
}
return FALSE;
}
/*
*-----------------------------------------------------------------------------------
*
* VMCIHandleArray_GetCopy --
*
* Results:
* Returns pointer to copy of array on success or NULL, if memory allocation
* fails.
*
* Side effects:
* Allocates nonpaged memory.
*
*-----------------------------------------------------------------------------------
*/
static INLINE VMCIHandleArray *
VMCIHandleArray_GetCopy(const VMCIHandleArray *array)
{
VMCIHandleArray *arrayCopy;
ASSERT(array);
arrayCopy = (VMCIHandleArray *)VMCI_AllocKernelMem(sizeof array->capacity +
sizeof array->size +
array->size * sizeof(VMCIHandle),
VMCI_MEMORY_NONPAGED |
VMCI_MEMORY_ATOMIC);
if (arrayCopy != NULL) {
memcpy(&arrayCopy->size, &array->size,
sizeof array->size + array->size * sizeof(VMCIHandle));
arrayCopy->capacity = array->size;
}
return arrayCopy;
}
/*
*-----------------------------------------------------------------------------------
*
* VMCIHandleArray_GetHandles --
*
* Results:
* NULL if the array is empty. Otherwise, a pointer to the array
* of VMCI handles in the handle array.
*
* Side effects:
* None.
*
*-----------------------------------------------------------------------------------
*/
static INLINE VMCIHandle *
VMCIHandleArray_GetHandles(VMCIHandleArray *array) // IN
{
ASSERT(array);
if (array->size) {
return array->entries;
} else {
return NULL;
}
}
#endif // _VMCI_HANDLE_ARRAY_H_
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