/******************************************************************************
Welcome to GDB Online.
GDB online is an online compiler and debugger tool for C, C++, Python, PHP, Ruby,
C#, VB, Perl, Swift, Prolog, Javascript, Pascal, HTML, CSS, JS
Code, Compile, Run and Debug online from anywhere in world.
Gabriel Staples
www.ElectricRCAircraftGuy.com
20 Aug. 2020
To run locally:
g++ -Wall -Werror -ggdb -std=c++17 -o temp onlinegdb--atomic_block_in_cpp.cpp && ./temp
See also:
1. My "gcc_attribute_cleanup_practice_1" code on onlinegdb: https://www.onlinegdb.com/edit/rJtZoHNb4
2. My Arduino answer here: https://arduino.stackexchange.com/questions/77494/which-arduinos-support-atomic-block/77579#77579.
3. In C++ can constructor and destructor be inline functions?:
https://stackoverflow.com/questions/21303/in-c-can-constructor-and-destructor-be-inline-functions
*******************************************************************************/
#include <stdio.h>
#define ATOMIC_BLOCK_FORCEON AtomicBlockForceOn atomicBlockForceOn_
class AtomicBlockForceOn
{
public:
// Constructor: called when the object is created
inline AtomicBlockForceOn()
{
printf("noInterrupts()\n"); // turn interrupts OFF
}
// Destructor: called when the object is destroyed (ex: goes
// out-of-scope)
inline ~AtomicBlockForceOn()
{
printf("interrupts()\n"); // turn interrupts ON
}
};
int main()
{
printf("Hello World\n");
printf("before ATOMIC_BLOCK_FORCEON\n");
{
ATOMIC_BLOCK_FORCEON;
printf("after ATOMIC_BLOCK_FORCEON constructor\n");
printf("do some stuff here with interrupts off!\n");
} // the `atomicBlockForceOn_` object's destructor is called here
// and interrupts are automatically turned back ON!
printf("after ATOMIC_BLOCK_FORCEON destructor\n");
return 0;
}
/*
SAMPLE OUTPUT:
Hello World
before ATOMIC_BLOCK_FORCEON
noInterrupts()
after ATOMIC_BLOCK_FORCEON constructor
do some stuff here with interrupts off!
interrupts()
after ATOMIC_BLOCK_FORCEON destructor
*/
