无法在此代码中找到发生内存泄漏的位置。
基本上我想为一个返回二维数组的 C 函数编写一个 XS 包装器。
C函数:
int CW_returnArray(double** arrayDouble, int* count)
{
int number = 10;
int index, index1;
for(index = 0; index < number; index++)
{
for(index1 = 0; index1 < 10000; index1++)
{
arrayDouble[index][index1] = 12.51;
}
count[index] = 10000;
}
return number;
}
array -> output param to hold the two dimensional array
count -> output param to hold the number of element in each 1D array
XS 包装:
void
returnArray()
PPCODE:
{
/** variable declaration **/
double** array;
int i = 0, j=0, status;
int* count;
int totalArrays;
SV** SVArrays; // to hold the references of 1D arrays
SV** SVtempArray; // temporary array to hold the elements of 1D array
/** allocate memory for C-type variables **/
New(0, array, 10, double*);
for(i = 0; i<10;i++)
{
New(0, array[i], 10000, double);
}
New(0, count, 10, int);
/** call C function **/
status = CW_returnArray(array, count);
/** check the status and retrieve the array to store it in stack **/
if(status > 0)
{
totalArrays = status;
New(0, SVArrays, totalArrays, SV*);
for(i = 0; i<totalArrays; i++)
{
/** allocate memory for temporary SV array **/
New(0, SVtempArray, count[i], SV*);
for(j = 0; j<count[i]; j++)
{
SVtempArray[j] = newSVnv(array[i][j]);
}
/** Make an array (AV) out of temporary SV array and store the reference in SVArrays **/
SVArrays[i] = newRV_noinc((SV*) av_make(count[i], SVtempArray));
/** free the memory allocated for temp SV array **/
for(j = 0; j<count[i]; j++)
{
sv_free(SVtempArray[j]);
}
Safefree(SVtempArray); SVtempArray = NULL;
}
}
else
{
totalArrays = 0;
}
/** push the return values to stack **/
EXTEND(SP, 2);
PUSHs(sv_2mortal(newSViv(status)));
PUSHs(sv_2mortal(newRV_noinc((SV*) av_make(totalArrays, SVArrays))));
/** clean up allocated memory for SV "array of array" , if needed **/
if(totalArrays > 0)
{
Safefree(SVArrays); SVArrays = NULL;
}
/** clean up allocated memory for C-type variables **/
for(i = 0; i<10;i++)
{
Safefree(array[i]);
}
Safefree(array); array = NULL;
Safefree(count); count = NULL;
}
从 XS 返回一个“数组数组”。
在 Perl 脚本中进行测试:
for(1..100)
{
my ($status, $arrayref) = returnArray();
undef $status;
$arrayref = [];
system('pause');
}
每次returnArray()
调用该函数时,Perl 进程的 Commit 大小都会增加。但我希望$arrayref
变量每次都应该被垃圾收集,并且内存使用量不应该增加。
我希望,我正在释放 XS 中所有分配的内存。但是仍然存在内存泄漏。这个内存泄漏的 XS 代码有什么问题?