A$22-$ WAP to multiply two matrices using multiple threads in c language

Pre$-$requisites:

$$ Knowledge about multi$-$thread process, How to read and understand $$man pages$.$

$$ Good knowledge about pthread library functions.

$$ Multiplication of two matrices.

$$ Dynamic allocation for $2$D array.

Objective:

$$ To understand working and flow of multithread programs.

Requirements:

$1.$ Create three local matrices, M$1$ MxN M$2$ NxP and Result MxP $($M$1$ columns $=$ M$2$ rows$)$ where M$,$ N & P values are provided by user.

$2.$ In case M$1$ columns $!=$ M$2$ rows print error message to user.

$3.$ Create all matrices using dynamic allocation.

$4.$ Use structure to pass arguments to threads sample structure.

typedef struct thread$\_$data $\{$

short m$1\_$row;

short m$1\_$col;

short m$2\_$col;

int $**$matrix$1$;

int $**$matrix$2$;

int $**$result;

short cur$\_$row;

$\}$Thread$\_$data$\_$t; $$

$5.$ Each thread will calculate and store single row in result. So number of threads equals number of rows in M$1.$

Eg: M$1=123$ M$2=111$

$111222$

$222333$

Thread $1$ : M$1$ row$1$ x M$2$ col$1,$ col$2,$ col$3$

$1$x$1+2$x$2+3$x$31$x$1+2$x$2+3$x$31$x$1+2$x$2+3$x$3$

$141414$

Thread $2$ : M$1$ row$2$ x M$2$ col$1,$ col$2,$ col

$1$x$1+1$x$2+1$x$31$x$1+1$x$2+1$x$31$x$1+1$x$2+1$x$3$

$666$

Thread $3$ : M$1$ row$3$ x M$2$ col$1,$ col$2,$ col$3$

$2$x$1+2$x$2+2$x$32$x$1+2$x$2+2$x$32$x$1+2$x$2+2$x$3$

$1212126.$

$$Don$\text{'}$t create any global variables.

$7.$ Create generic function for matrix dynamic allocation and deallocating.$$

Sample execution: $-$

$1../$matrix$\_$mul

Enter M$1$ rows and columns $33$

Enter M$2$ rows and columns $33$

Enter M$1$ values $123111222$

Enter M$2$ values $123123123$

Result is

$141414$

$666$

$121212$