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@(@\newcommand{\W}[1]{ \; #1 \; } \newcommand{\R}[1]{ {\rm #1} } \newcommand{\B}[1]{ {\bf #1} } \newcommand{\D}[2]{ \frac{\partial #1}{\partial #2} } \newcommand{\DD}[3]{ \frac{\partial^2 #1}{\partial #2 \partial #3} } \newcommand{\Dpow}[2]{ \frac{\partial^{#1}}{\partial {#2}^{#1}} } \newcommand{\dpow}[2]{ \frac{ {\rm d}^{#1}}{{\rm d}\, {#2}^{#1}} }@)@This is cppad-20221105 documentation. Here is a link to its current documentation .
atomic_mat_mul Set Routine: Example Implementation

Syntax
call_id = mat_mul.set(n_left, n_middle, n_right)

Prototype 

template <class Base>
size_t atomic_mat_mul<Base>::set(
    size_t n_left, size_t n_middle, size_t n_right
)

Purpose
Stores the dimension information for a an atomic operation that computes the matrix product R = A * B .

n_left
This argument is the row dimension of the matrices A and R .

n_middle
This argument is the column dimension of the matrix A and row dimension of the matrix B .

n_right
This argument is the column dimension of the matrices B and R .

call_id
This return value identifies the dimension information above.

Source 

# include <cppad/example/atomic_four/mat_mul/mat_mul.hpp>

namespace CppAD { // BEGIN_CPPAD_NAMESPACE
// BEGIN PROTOTYPE
template <class Base>
size_t atomic_mat_mul<Base>::set(
    size_t n_left, size_t n_middle, size_t n_right
)
// END PROTOTYPE
{
    // thread
    size_t thread = thread_alloc::thread_num();
    //
    // work_[thread]
    if( work_[thread] == nullptr )
        work_[thread] = new call_vector;
    //
    // call_id
    size_t call_id = work_[thread]->size();
    //
    // call
    call_struct call;
    call.n_left   = n_left;
    call.n_middle = n_middle;
    call.n_right  = n_right;
    call.thread   = thread;
    //
    // work_[thread]
    work_[thread]->push_back( call );
    //
    return call_id;
}
} // END_CPPAD_NAMESPACE
Input File: include/cppad/example/atomic_four/mat_mul/set.hpp