From 5af72efc4220c2d1bd145edeefa230dcdd7fd5dc Mon Sep 17 00:00:00 2001
From: Amar Mahmutbegovic <amar.mahmutbegovic@gmail.com>
Date: Sat, 27 Apr 2024 21:02:06 +0200
Subject: [PATCH] add Chapter02 examples

---
 Chapter02/README.md                  | 10 ++++++++
 Chapter02/new_deleted.cpp            | 21 +++++++++++++++++
 Chapter02/terminate_handler.cpp      | 20 ++++++++++++++++
 Chapter02/vector_dyn_mem.cpp         | 30 ++++++++++++++++++++++++
 Chapter02/vector_dyn_mem_reserve.cpp | 33 +++++++++++++++++++++++++++
 Chapter02/vector_pmr.cpp             | 34 ++++++++++++++++++++++++++++
 6 files changed, 148 insertions(+)
 create mode 100644 Chapter02/README.md
 create mode 100644 Chapter02/new_deleted.cpp
 create mode 100644 Chapter02/terminate_handler.cpp
 create mode 100644 Chapter02/vector_dyn_mem.cpp
 create mode 100644 Chapter02/vector_dyn_mem_reserve.cpp
 create mode 100644 Chapter02/vector_pmr.cpp

diff --git a/Chapter02/README.md b/Chapter02/README.md
new file mode 100644
index 0000000..4d6755b
--- /dev/null
+++ b/Chapter02/README.md
@@ -0,0 +1,10 @@
+# Chapter02
+
+This folder contains examples in C++ from second chapter. 
+
+The folder contains following examples:
+- vector_dyn_mem.cpp
+- vector_dyn_mem_reserve.cpp
+- vector_pmr.cpp
+- terminate_handler.cpp
+- new_deleted.cpp
diff --git a/Chapter02/new_deleted.cpp b/Chapter02/new_deleted.cpp
new file mode 100644
index 0000000..77a4232
--- /dev/null
+++ b/Chapter02/new_deleted.cpp
@@ -0,0 +1,21 @@
+#include <cstdio>
+#include <vector>
+#include <new>
+
+void *operator new(std::size_t count) = delete;
+void *operator new[](std::size_t count) = delete;
+
+void *operator new(std::size_t count, std::align_val_t al) = delete;
+void *operator new[](std::size_t count, std::align_val_t al) = delete;
+void *operator new(std::size_t count, const std::nothrow_t &tag) = delete;
+void *operator new[](std::size_t count, const  std::nothrow_t &tag) = delete;
+void *operator new(std::size_t count, std::align_val_t al, const std::nothrow_t &) = delete;
+void *operator new[](std::size_t count, std::align_val_t al, const std::nothrow_t &) = delete;
+
+int main() {
+ std::vector<int> vec;
+ vec.push_back(123);
+ printf("vec[0] = %d\r\n", vec[0]);
+ return 0;
+}
+
diff --git a/Chapter02/terminate_handler.cpp b/Chapter02/terminate_handler.cpp
new file mode 100644
index 0000000..b2e59c9
--- /dev/null
+++ b/Chapter02/terminate_handler.cpp
@@ -0,0 +1,20 @@
+#include <array>
+#include <cstdio>
+#include <cstdlib>
+#include <exception>
+
+int main() {
+  constexpr auto my_terminate_handler = []() {
+    printf("This is my_terminate_handler\r\n");
+    std::abort();
+  };
+
+  std::set_terminate(my_terminate_handler);
+
+  std::array<int, 4> arr;
+  for (int i = 0; i < 5; i++) {
+    arr.at(i) = i;
+  }
+
+  return 0;
+}
diff --git a/Chapter02/vector_dyn_mem.cpp b/Chapter02/vector_dyn_mem.cpp
new file mode 100644
index 0000000..d36682e
--- /dev/null
+++ b/Chapter02/vector_dyn_mem.cpp
@@ -0,0 +1,30 @@
+#include <cstdint>
+#include <cstdio>
+#include <cstdlib>
+#include <vector>
+
+void *operator new(std::size_t count) {
+  printf("%s, size = %ld\r\n", __PRETTY_FUNCTION__, count);
+  return std::malloc(count);
+}
+
+void operator delete(void *ptr) noexcept {
+  printf("%s\r\n", __PRETTY_FUNCTION__);
+  std::free(ptr);
+}
+
+int main() {
+  std::vector<std::uint8_t> vec;
+  constexpr std::size_t n_elem = 8;
+  for (std::uint8_t i = 0; i < n_elem; i++) {
+    vec.push_back(i);
+  }
+  const auto print_array = [](uint8_t *arr, std::size_t n) {
+    for (std::size_t i = 0; i < n; i++) {
+      printf("%d ", arr[i]);
+    }
+    printf("\r\n");
+  };
+  print_array(vec.data(), n_elem);
+  return 0;
+}
diff --git a/Chapter02/vector_dyn_mem_reserve.cpp b/Chapter02/vector_dyn_mem_reserve.cpp
new file mode 100644
index 0000000..db98497
--- /dev/null
+++ b/Chapter02/vector_dyn_mem_reserve.cpp
@@ -0,0 +1,33 @@
+#include <cstdint>
+#include <cstdio>
+#include <cstdlib>
+#include <vector>
+
+void *operator new(std::size_t count) {
+  printf("%s, size = %ld\r\n", __PRETTY_FUNCTION__, count);
+  return std::malloc(count);
+}
+
+void operator delete(void *ptr) noexcept {
+  printf("%s\r\n", __PRETTY_FUNCTION__);
+  std::free(ptr);
+}
+
+int main() {
+  std::vector<std::uint8_t> vec;
+  constexpr std::size_t n_elem = 8;
+
+  vec.reserve(n_elem);
+
+  for (std::uint8_t i = 0; i < n_elem; i++) {
+    vec.push_back(i);
+  }
+  const auto print_array = [](uint8_t *arr, std::size_t n) {
+    for (std::size_t i = 0; i < n; i++) {
+      printf("%d ", arr[i]);
+    }
+    printf("\r\n");
+  };
+  print_array(vec.data(), n_elem);
+  return 0;
+}
diff --git a/Chapter02/vector_pmr.cpp b/Chapter02/vector_pmr.cpp
new file mode 100644
index 0000000..e4114cb
--- /dev/null
+++ b/Chapter02/vector_pmr.cpp
@@ -0,0 +1,34 @@
+#include <array>
+#include <cstdio>
+#include <cstdlib>
+#include <memory_resource>
+#include <new>
+#include <vector>
+
+void *operator new(std::size_t count, std::align_val_t al) {
+  printf("%s, size = %ld\r\n", __PRETTY_FUNCTION__, count);
+  return std::malloc(count);
+}
+
+int main() {
+  using namespace std;
+  using namespace std::pmr;
+
+  constexpr size_t n_elem = 8;
+  array<uint8_t, sizeof(uint8_t) * 8> buffer{0};
+  monotonic_buffer_resource mbr{buffer.data(), buffer.size()};
+  polymorphic_allocator<uint8_t> pa{&mbr};
+  std::pmr::vector<uint8_t> vec{pa};
+  // vec.reserve(n_elem);
+  //
+  for (uint8_t i = 0; i < n_elem; i++) {
+    vec.push_back(i);
+  }
+
+  for (uint8_t data : buffer) {
+    printf("%d ", data);
+  }
+  printf("\r\n");
+
+  return 0;
+}