# paryfor

**Repository Path**: bioinformatix/paryfor

## Basic Information

- **Project Name**: paryfor
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2022-03-25
- **Last Updated**: 2022-03-25

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# paryfor

a parallel_for implementation based on atomic queues

## usage

The `parallel_for` templates replace `#pragma omp parallel for`.
We use a callback that takes the iteration number.
To avoid compiler confusion, we can specify the iteration type in the template.

```c++
#include "paryfor.hpp"

int main(int argc, char** argv) {
    uint64_t todo_count = std::stoul(argv[1]);
    int thread_count = std::stoi(argv[2]);
    int chunk_size = std::stoi(argv[3]);
    paryfor::parallel_for<uint64_t>(
        0, todo_count, thread_count, chunk_size,
        [&](uint64_t i, int tid) {
            // do work
        });
}
```

We don't need to use `chunk_size`.
If omitted, we use a template that queues single iteration values, rather than ranges.

We can also pass a function that does not take its thread id as an argument.

## thanks

This utility depends on Maxim Egorushkin's atomic_queue library, which is included in the single header file `paryfor.hpp`.

## author

Erik Garrison

## license

MIT