threading

Cargo.lock

@@ -1,3 +1,8 @@
+[[package]]
+name = "libc"
+version = "0.2.50"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "num-bigint"
 version = "0.2.2"
@@ -20,14 +25,25 @@ name = "num-traits"
 version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "num_cpus"
+version = "1.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "per"
 version = "0.1.0"
 dependencies = [
  "num-bigint 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [metadata]
+"checksum libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)" = "aab692d7759f5cd8c859e169db98ae5b52c924add2af5fbbca11d12fefb567c1"
 "checksum num-bigint 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "57450397855d951f1a41305e54851b1a7b8f5d2e349543a02a2effe25459f718"
 "checksum num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)" = "e83d528d2677f0518c570baf2b7abdcf0cd2d248860b68507bdcb3e91d4c0cea"
 "checksum num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "0b3a5d7cc97d6d30d8b9bc8fa19bf45349ffe46241e8816f50f62f6d6aaabee1"
+"checksum num_cpus 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1a23f0ed30a54abaa0c7e83b1d2d87ada7c3c23078d1d87815af3e3b6385fbba"

Cargo.toml

@@ -6,3 +6,4 @@ edition = "2018"
 
 [dependencies]
 num-bigint = "0.2"
+num_cpus = "1.0"

src/main.rs

@@ -1,18 +1,51 @@
 extern crate num_bigint;
 // extern crate num_traits;
+extern crate num_cpus;
+
 
 use num_bigint::BigUint;
 
+use std::thread;
+// use std::sync::mpsc;
+use std::sync::{Arc, Barrier, RwLock};
+
+
+
+
+trait Stuff {
+    fn factorize(&self) -> Self;
+    fn test(&self) -> u8;
+}
+
+impl Stuff for BigUint {
+    fn factorize(&self) -> BigUint {
+        let string = self.to_str_radix(10);
+        let numbers: Vec<u8> = string.chars().map(|x| x as u8 - 48).collect();
+        numbers.into_iter().product::<BigUint>()
+    }
+    
+    fn test(&self) -> u8 {
+        let mut n = self.factorize();
+        let mut counter = 1;
+        while n.to_str_radix(10).chars().count() > 1 {
+            n = n.factorize();
+            counter += 1;
+        }
+        return counter;
+    }
+}
+
+
+#[derive(Debug)]
 struct Counter {
-    length: u64,
-    prefix: u8,
-    last: BigUint,
-    total: BigUint
+    count: BigUint,
+    step: u8,
+    offset: u8
 }
 
 impl Counter {
-    fn new() -> Counter {
-        Counter {length: 1, prefix: 0, last: BigUint::from(0u8), total: BigUint::from(0u8)}
+    fn new(_step: u8, _offset: u8) -> Counter {
+        Counter {count: BigUint::from(0u8), step: _step, offset: _offset}
     }
 }
 
@@ -20,68 +53,37 @@ impl Iterator for Counter {
     type Item = BigUint;
 
     fn next(&mut self) -> Option<BigUint> {
-        let old = self.last;
-        let old_str = old.to_str_radix(10);
-        let mut new_str = old_str;
-
-        let mut carry = true;
-        let mut index = 0;
-
-        while carry != true {
-            match old_str[old_str.chars().count() - 1 - index] {
-                '5' => {carry = false; new_str[new_str.chars().count() - 1 - index] = '7'},
-                '7' => {carry = false; new_str[new_str.chars().count() - 1 - index] = '8'},
-                '8' => {carry = false; new_str[new_str.chars().count() - 1 - index] = '9'},
-                '9' => {carry = true; index += 1; new_str[new_str.chars().count() - 1 - index + 1] = '5'}
-            }
-        }
-        if carry == true {
-            self.prefix += 1;
-        }
-
-        let new_string = String::new();
-        new_string.push_str(match self.prefix {
-            0 => "",
-            1 => "2",
-            2 => "3",
-            3 => "4",
-            4 => "6",
-            5 => "26"
-        });
-        new_string.push_str(new_str);
-        return BigUint::from_str(new_string);
+        // Increment our count. This is why we started at zero.
+        self.count += self.step;
+        Some(self.count.clone())
     }
 }
 
 fn main() {
-    let mut num = BigUint::from(0 as u8);
-    // num = num + 277777788888899u128;
+    let cpus: u8 = num_cpus::get() as u8;
+    println!("{:?}", cpus);
+
+    let barrier = Arc::new(Barrier::new(2));
+
+    for thread in 0..(cpus) {
+        let c = barrier.clone();
+        thread::spawn(move || {
+            println!("Started thread {}!", thread);
+            let counter =  Counter::new(cpus-thread, cpus);
             let mut max: u8 = 0;
-
-    let mut n = test(num.clone());
-    while n < 10 {
-        n = test(num.clone());
-        if (n > max) {
+            for x in counter {
+                let n = x.test();
+                if n > max {
                     max = n;
-            println!("{}: {}", n, num);
+                    println!("{} - {}: {}", thread, n, x);
+                    if n == 10 {
+                        c.wait();
+                        return;
                     }
-        num += 1u8;
                 }
-}
-
-fn test(input: BigUint) -> u8 {
-    let mut n = factorize(input);
-    let mut counter = 1;
-    while (n.to_str_radix(10).chars().count() > 1) {
-        n = factorize(n);
-        // println!("n: {:?}", n);
-        counter += 1;
             }
-    return counter;
-}
-
-fn factorize(input: BigUint) -> BigUint {
-    let string = input.to_str_radix(10);
-    let numbers: Vec<u8> = string.chars().map(|x| x as u8 - 48).collect();
-    numbers.into_iter().product::<BigUint>()
+        });
+    }
+    barrier.wait();
+    return;
 }