Add mutex example
This commit is contained in:
Timothy Warren
parent
9c148dcf5c
commit
ef64ba88ab
1
.idea/misc.xml
generated
1
.idea/misc.xml
generated
@ -29,6 +29,7 @@
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<cargoProject FILE="$PROJECT_DIR$/interior_mutability/Cargo.toml" />
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<cargoProject FILE="$PROJECT_DIR$/reference_cycles/Cargo.toml" />
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<cargoProject FILE="$PROJECT_DIR$/threads/Cargo.toml" />
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<cargoProject FILE="$PROJECT_DIR$/mutex/Cargo.toml" />
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</component>
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<component name="ComposerJsonPluginSettings">
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<unboundedVersionInspectionSettings>
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5
.idea/rust.iml
generated
5
.idea/rust.iml
generated
@ -118,6 +118,10 @@
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<sourceFolder url="file://$MODULE_DIR$/threads/examples" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/threads/tests" isTestSource="true" />
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<sourceFolder url="file://$MODULE_DIR$/threads/benches" isTestSource="true" />
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<sourceFolder url="file://$MODULE_DIR$/mutex/src" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/mutex/examples" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/mutex/tests" isTestSource="true" />
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<sourceFolder url="file://$MODULE_DIR$/mutex/benches" isTestSource="true" />
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<excludeFolder url="file://$MODULE_DIR$/add/add-one/target" />
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<excludeFolder url="file://$MODULE_DIR$/add/adder/target" />
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<excludeFolder url="file://$MODULE_DIR$/adder/target" />
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@ -136,6 +140,7 @@
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<excludeFolder url="file://$MODULE_DIR$/minigrep/target" />
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<excludeFolder url="file://$MODULE_DIR$/minigrep_v2/target" />
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<excludeFolder url="file://$MODULE_DIR$/modules/target" />
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<excludeFolder url="file://$MODULE_DIR$/mutex/target" />
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<excludeFolder url="file://$MODULE_DIR$/rectangles/target" />
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<excludeFolder url="file://$MODULE_DIR$/reference_counting/target" />
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<excludeFolder url="file://$MODULE_DIR$/reference_cycles/target" />
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46
.idea/workspace.xml
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46
.idea/workspace.xml
generated
@ -15,10 +15,10 @@
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<component name="FileEditorManager">
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<leaf>
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<file pinned="false" current-in-tab="true">
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<entry file="file://$PROJECT_DIR$/threads/src/main.rs">
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<entry file="file://$PROJECT_DIR$/mutex/src/main.rs">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="864">
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<caret line="54" column="9" lean-forward="true" selection-start-line="54" selection-start-column="9" selection-end-line="54" selection-end-column="9" />
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<state>
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<caret column="91" selection-start-column="91" selection-end-column="91" />
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</state>
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</provider>
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</entry>
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@ -96,6 +96,7 @@
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<option value="$PROJECT_DIR$/reference_counting/src/main.rs" />
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<option value="$PROJECT_DIR$/reference_cycles/src/main.rs" />
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<option value="$PROJECT_DIR$/threads/src/main.rs" />
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<option value="$PROJECT_DIR$/mutex/src/main.rs" />
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</list>
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</option>
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</component>
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@ -129,12 +130,12 @@
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<path>
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<item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
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<item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
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<item name="threads" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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<item name="mutex" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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</path>
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<path>
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<item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
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<item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
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<item name="threads" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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<item name="mutex" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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<item name="src" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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</path>
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</expand>
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@ -168,7 +169,7 @@
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</component>
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<component name="PropertiesComponent">
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<property name="JavaScriptWeakerCompletionTypeGuess" value="true" />
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<property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1549393270881" />
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<property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1549394084677" />
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<property name="javascript.nodejs.core.library.configured.version" value="7.1.0" />
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<property name="js.eslint.eslintPackage" value="$USER_HOME$/.yarn-config/global/node_modules/.bin/eslint" />
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<property name="js.eslint.nodeInterpreter" value="project" />
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@ -196,7 +197,7 @@
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</list>
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</option>
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</component>
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<component name="RunManager" selected="Cargo Command.Run threads">
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<component name="RunManager" selected="Cargo Command.Run mutex">
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<configuration name="<template>" type="TestNG" default="true" selected="false">
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<option name="MAIN_CLASS_NAME" />
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<option name="VM_PARAMETERS" value="-ea" />
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@ -215,6 +216,16 @@
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<option name="Make" enabled="true" />
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</method>
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</configuration>
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<configuration name="Run mutex" type="CargoCommandRunConfiguration" factoryName="Cargo Command" temporary="true">
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<option name="channel" value="DEFAULT" />
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<option name="command" value="run --package mutex --bin mutex" />
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<option name="allFeatures" value="false" />
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<option name="nocapture" value="false" />
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<option name="backtrace" value="SHORT" />
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<option name="workingDirectory" value="file://$PROJECT_DIR$/mutex" />
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<envs />
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<method v="2" />
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</configuration>
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<configuration name="Run reference_counting" type="CargoCommandRunConfiguration" factoryName="Cargo Command" temporary="true">
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<option name="channel" value="DEFAULT" />
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<option name="command" value="run --package reference_counting --bin reference_counting" />
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@ -255,16 +266,6 @@
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<envs />
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<method v="2" />
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</configuration>
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<configuration name="Test tests::it_sends_an_over_75_percent_warning_message" type="CargoCommandRunConfiguration" factoryName="Cargo Command" temporary="true">
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<option name="channel" value="DEFAULT" />
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<option name="command" value="test --package interior_mutability --lib tests::it_sends_an_over_75_percent_warning_message -- --exact" />
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<option name="allFeatures" value="false" />
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<option name="nocapture" value="false" />
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<option name="backtrace" value="SHORT" />
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<option name="workingDirectory" value="file://$PROJECT_DIR$/interior_mutability" />
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<envs />
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<method v="2" />
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</configuration>
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<configuration default="true" type="JUnit" factoryName="JUnit">
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<option name="TEST_OBJECT" value="class" />
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<option name="WORKING_DIRECTORY" value="$MODULE_DIR$" />
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@ -274,11 +275,11 @@
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</configuration>
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<recent_temporary>
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<list>
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<item itemvalue="Cargo Command.Run mutex" />
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<item itemvalue="Cargo Command.Run threads" />
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<item itemvalue="Cargo Command.Run reference_cycles" />
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<item itemvalue="Cargo Command.Run reference_counting" />
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<item itemvalue="Cargo Command.Test lib::tests" />
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<item itemvalue="Cargo Command.Test tests::it_sends_an_over_75_percent_warning_message" />
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</list>
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</recent_temporary>
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</component>
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@ -765,7 +766,14 @@
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<entry file="file://$PROJECT_DIR$/threads/src/main.rs">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="864">
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<caret line="54" column="9" lean-forward="true" selection-start-line="54" selection-start-column="9" selection-end-line="54" selection-end-column="9" />
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<caret line="54" column="9" selection-start-line="54" selection-start-column="9" selection-end-line="54" selection-end-column="9" />
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</state>
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</provider>
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</entry>
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<entry file="file://$PROJECT_DIR$/mutex/src/main.rs">
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<provider selected="true" editor-type-id="text-editor">
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<state>
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<caret column="91" selection-start-column="91" selection-end-column="91" />
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</state>
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</provider>
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</entry>
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7
mutex/Cargo.toml
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7
mutex/Cargo.toml
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@ -0,0 +1,7 @@
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[package]
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name = "mutex"
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version = "0.1.0"
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authors = ["Timothy Warren <twarren@nabancard.com>"]
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edition = "2018"
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[dependencies]
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40
mutex/src/main.rs
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40
mutex/src/main.rs
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@ -0,0 +1,40 @@
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use std::sync::{Arc, Mutex}; // Rc is not thread safe, but Arc is. (Atomic Reference Count)
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use std::thread;
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fn single_thread_example() {
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let m = Mutex::new(5);
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{
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let mut num = m.lock().unwrap();
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*num = 6;
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} // Reference to mutex value goes out of scope, lock is released
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println!("m = {:?}", m);
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}
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fn multi_thread_example() {
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let counter = Arc::new(Mutex::new(0));
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let mut handles = vec![];
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for _ in 0..10 {
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let counter = Arc::clone(&counter);
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let handle = thread::spawn(move || {
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let mut num = counter.lock().unwrap();
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*num += 1;
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});
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handles.push(handle);
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}
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for handle in handles {
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handle.join().unwrap();
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}
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println!("Result: {}", *counter.lock().unwrap());
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}
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fn main() {
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single_thread_example();
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multi_thread_example();
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}
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