[英]How to pass a struct with an matrix as pthread argument?
I have the following struct: 我有以下结构:
typedef struct {
int row;
int** matrix;
} values ;
To fill the struct matrix I tried the following code: 为了填充结构矩阵,我尝试了以下代码:
values **v = (values **)malloc(x * sizeof(values *));
for (int z = 0; z < y; ++z)
[z] = (values *)malloc(y * sizeof(values));
Where x is the number of rows and y columns. 其中x是行数和y列数。
How can I populate the arguments ( row
and matrix
) of struct and pass as parameter to a function called by pthread? 如何填充struct的参数(
row
和matrix
),并将其作为参数传递给pthread调用的函数? Something similar to... 类似于...
pthread_create(&thread1, NULL, somaLinha, v);
When you allocate the space for the struct, C is actually going to allocate the space for an integer plus the space for the pointer (which is 4+8 bytes) 当您为结构分配空间时,C实际上将为整数分配空间加上指针的空间(4 + 8字节)
You need to allocate the space for the struct, and then allocate for the matrix 您需要为结构分配空间,然后为矩阵分配
values *v = (values *) malloc(sizeof(values));
v->matrix = (int **) malloc(y * sizeof(int *));
for (int z = 0; z < y; ++z)
v->matrix[z] = (int *) malloc(y * sizeof(int));
And then you create the thread 然后创建线程
pthread_create(&thread1, NULL, somaLinha, v);
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