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tomosstomoss
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Merge pull request #1 from tomoss/dev
Reworked the examples.
2 parents 8558cf0 + 7ad89e7 commit c7e87d8

33 files changed

Lines changed: 260 additions & 235 deletions

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‎.clang-format‎

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@@ -1,12 +1,12 @@
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---
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Language: Cpp
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Language: Cpp
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# BasedOnStyle: LLVM
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AccessModifierOffset: -4
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AlignAfterOpenBracket: Align
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AlignConsecutiveAssignments: false
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AlignConsecutiveDeclarations: false
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AlignEscapedNewlines: Right
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AlignOperands: true
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AlignOperands: true
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AlignTrailingComments: true
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AllowAllParametersOfDeclarationOnNextLine: true
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AllowShortBlocksOnASingleLine: false
@@ -21,18 +21,18 @@ AlwaysBreakTemplateDeclarations: Yes
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BinPackArguments: true
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BinPackParameters: true
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BraceWrapping:
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AfterClass: false
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AfterClass: false
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AfterControlStatement: false
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AfterEnum: false
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AfterFunction: false
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AfterNamespace: false
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AfterEnum: false
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AfterFunction: false
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AfterNamespace: false
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AfterObjCDeclaration: false
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AfterStruct: false
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AfterUnion: false
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AfterStruct: false
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AfterUnion: false
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AfterExternBlock: false
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BeforeCatch: false
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BeforeElse: true
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IndentBraces: false
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BeforeCatch: false
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BeforeElse: true
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IndentBraces: false
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SplitEmptyFunction: true
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SplitEmptyRecord: true
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SplitEmptyNamespace: true
@@ -45,39 +45,39 @@ BreakConstructorInitializersBeforeComma: true
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BreakConstructorInitializers: BeforeColon
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BreakAfterJavaFieldAnnotations: false
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BreakStringLiterals: true
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ColumnLimit: 160
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CommentPragmas: '^ IWYU pragma:'
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ColumnLimit: 160
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CommentPragmas: "^ IWYU pragma:"
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CompactNamespaces: false
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ConstructorInitializerAllOnOneLineOrOnePerLine: false
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ConstructorInitializerIndentWidth: 4
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ContinuationIndentWidth: 4
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Cpp11BracedListStyle: true
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DerivePointerAlignment: false
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DisableFormat: false
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DisableFormat: false
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ExperimentalAutoDetectBinPacking: false
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FixNamespaceComments: true
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ForEachMacros:
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- foreach
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- Q_FOREACH
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- BOOST_FOREACH
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IncludeBlocks: Preserve
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IncludeBlocks: Preserve
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IncludeCategories:
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- Regex: '^"(llvm|llvm-c|clang|clang-c)/'
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Priority: 2
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- Regex: '^(<|"(gtest|gmock|isl|json)/)'
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Priority: 3
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- Regex: '.*'
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Priority: 1
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IncludeIsMainRegex: '(Test)?$'
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- Regex: '^"(llvm|llvm-c|clang|clang-c)/'
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Priority: 2
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- Regex: '^(<|"(gtest|gmock|isl|json)/)'
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Priority: 3
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- Regex: ".*"
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Priority: 1
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IncludeIsMainRegex: "(Test)?$"
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IndentCaseLabels: false
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IndentPPDirectives: None
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IndentWidth: 4
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IndentWidth: 4
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IndentWrappedFunctionNames: false
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JavaScriptQuotes: Leave
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JavaScriptWrapImports: true
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KeepEmptyLinesAtTheStartOfBlocks: true
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MacroBlockBegin: ''
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MacroBlockEnd: ''
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MacroBlockBegin: ""
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MacroBlockEnd: ""
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MaxEmptyLinesToKeep: 1
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NamespaceIndentation: All
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ObjCBinPackProtocolList: Auto
@@ -93,8 +93,8 @@ PenaltyBreakTemplateDeclaration: 10
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PenaltyExcessCharacter: 1000000
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PenaltyReturnTypeOnItsOwnLine: 60
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PointerAlignment: Left
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ReflowComments: true
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SortIncludes: true
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ReflowComments: true
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SortIncludes: true
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SortUsingDeclarations: true
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SpaceAfterCStyleCast: false
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SpaceAfterTemplateKeyword: false
@@ -106,13 +106,13 @@ SpaceBeforeParens: ControlStatements
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SpaceBeforeRangeBasedForLoopColon: true
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SpaceInEmptyParentheses: false
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SpacesBeforeTrailingComments: 1
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SpacesInAngles: false
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SpacesInAngles: false
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SpacesInContainerLiterals: true
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SpacesInCStyleCastParentheses: false
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SpacesInParentheses: false
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SpacesInSquareBrackets: false
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Standard: Cpp11
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TabWidth: 4
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UseTab: Never
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Standard: Latest
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TabWidth: 4
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UseTab: Never
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...
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singleton-smart-pointer-example/CMakeLists.txt renamed to 01-singleton-classic-example/CMakeLists.txt

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@@ -1,14 +1,14 @@
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cmake_minimum_required(VERSION 3.21)
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project(singleton-smart-pointer-example VERSION 0.1.0 LANGUAGES CXX)
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project(01-singleton-classic-example VERSION 0.1.0 LANGUAGES CXX)
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# Export compile commands for clangd
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set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
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7-
add_executable(singleton-smart-pointer-example
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add_executable(01-singleton-classic-example
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src/main.cpp
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src/singleton.cpp
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)
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target_include_directories(singleton-smart-pointer-example PRIVATE
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target_include_directories(01-singleton-classic-example PRIVATE
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${CMAKE_CURRENT_SOURCE_DIR}/inc
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)

singleton-classic-static-example/inc/singleton.h renamed to 01-singleton-classic-example/inc/singleton.h

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@@ -10,7 +10,7 @@ class Singleton {
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return instance;
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}
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void func();
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void info();
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private:
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Singleton();

‎01-singleton-classic-example/src/main.cpp‎

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#include "singleton.h"
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#include <iostream>
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#include <thread>
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#include <vector>
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/*
7+
* Example with static member variable
8+
* Static memory allocation
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* Eager initialization
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* Singleton is created before main() and destroyed after main() call
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* Initialization is thread-safe - The static member is initialized before main() in a single-threaded context, so no construction race is possible.
12+
* The Static Initialization Order Fiasco - If the singleton instance is accessed during the initialization of another static object.
13+
*/
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15+
int main() {
16+
std::cout << "--- main start ---" << std::endl;
17+
18+
std::vector<std::thread> threads;
19+
20+
// Launch 10 threads
21+
for (int i = 0; i < 10; ++i) {
22+
threads.emplace_back([]() { Singleton::getInstance().info(); });
23+
}
24+
25+
for (auto& t : threads) {
26+
t.join();
27+
}
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29+
std::cout << "--- main end ---" << std::endl;
30+
}

singleton-classic-static-example/src/singleton.cpp renamed to 01-singleton-classic-example/src/singleton.cpp

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#include "singleton.h"
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#include <iostream>
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#include <syncstream>
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#include <thread>
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46
Singleton Singleton::instance;
57

68
Singleton::Singleton() {
79
std::cout << "Singleton created." << std::endl;
810
}
911

10-
void Singleton::func() {
11-
std::cout << "Doing something..." << std::endl;
12+
void Singleton::info() {
13+
std::osyncstream(std::cout) << "Current instance address: " << this << " | Current thread ID: " << std::this_thread::get_id() << '\n';
1214
}
1315

1416
Singleton::~Singleton() {

singleton-classic-static-example/CMakeLists.txt renamed to 02-singleton-meyers-example/CMakeLists.txt

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@@ -1,14 +1,14 @@
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cmake_minimum_required(VERSION 3.21)
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project(singleton-classic-static-example VERSION 0.1.0 LANGUAGES CXX)
2+
project(02-singleton-meyers-example VERSION 0.1.0 LANGUAGES CXX)
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44
# Export compile commands for clangd
55
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
66

7-
add_executable(singleton-classic-static-example
7+
add_executable(02-singleton-meyers-example
88
src/main.cpp
99
src/singleton.cpp
1010
)
1111

12-
target_include_directories(singleton-classic-static-example PRIVATE
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target_include_directories(02-singleton-meyers-example PRIVATE
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${CMAKE_CURRENT_SOURCE_DIR}/inc
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)

singleton-meyers-example/inc/singleton.h renamed to 02-singleton-meyers-example/inc/singleton.h

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@@ -10,7 +10,7 @@ class Singleton {
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return instance;
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}
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13-
void func();
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void info();
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private:
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Singleton();

singleton-meyers-example/src/main.cpp renamed to 02-singleton-meyers-example/src/main.cpp

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@@ -4,7 +4,7 @@
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#include <vector>
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66
/*
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* Meyer’s Singleton - Example with STATIC LOCAL VARIABLE
7+
* Meyer’s Singleton - Example with static local variable
88
* Static memory allocation
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* Lazy initialization
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* Singleton is created only after first call of getInstance() and destroyed after main() call
@@ -20,7 +20,7 @@ int main() {
2020

2121
// Launch 10 threads
2222
for (int i = 0; i < 10; ++i) {
23-
threads.emplace_back([]() { Singleton::getInstance().func(); });
23+
threads.emplace_back([]() { Singleton::getInstance().info(); });
2424
}
2525

2626
for (auto& t : threads) {

singleton-meyers-example/src/singleton.cpp renamed to 02-singleton-meyers-example/src/singleton.cpp

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Original file line numberDiff line numberDiff line change
@@ -1,12 +1,14 @@
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#include "singleton.h"
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#include <iostream>
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#include <syncstream>
4+
#include <thread>
35

46
Singleton::Singleton() {
57
std::cout << "Singleton created." << std::endl;
68
}
79

8-
void Singleton::func() {
9-
std::cout << "Doing something..." << std::endl;
10+
void Singleton::info() {
11+
std::osyncstream(std::cout) << "Current instance address: " << this << " | Current thread ID: " << std::this_thread::get_id() << '\n';
1012
}
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1214
Singleton::~Singleton() {

‎03-singleton-classic-dynamic-example/CMakeLists.txt‎

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cmake_minimum_required(VERSION 3.21)
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project(03-singleton-classic-dynamic-example VERSION 0.1.0 LANGUAGES CXX)
3+
4+
# Export compile commands for clangd
5+
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
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7+
add_executable(03-singleton-classic-dynamic-example
8+
src/main.cpp
9+
src/singleton.cpp
10+
)
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12+
target_include_directories(03-singleton-classic-dynamic-example PRIVATE
13+
${CMAKE_CURRENT_SOURCE_DIR}/inc
14+
)

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