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examples: Remove heap allocation from C++ examples

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Cleanup of UPM C++ examples.  Switched from heap allocation to
stack allocation when possible.  This simplifies the samples since it
removes the need for explicit memory management.  A script was used to
identify and replace pointer use.  To simplify the replace script, I
re-formatted the C++ examples using the UPM .clang-format file.
Unfortuantely this changes the look of the UPM C++ examples to a large
degree.  However, examples will now have a standard look/feel and
uniform formatting.

    * Ran clang-format w/provided UPM .clang-format file
    * Removed new's/delete's whenever possible (left those in interface
      examples)
    * Added IIO sensor library implementation of callback void* arg
    * Converted all sleeps to upm defined delays (added header when
      necessary)
    * Scrubbed CXX example includes

Signed-off-by: Noel Eck <noel.eck@intel.com>
This commit is contained in:
Noel Eck
2017-08-30 15:00:29 -07:00
committed by Mihai Tudor Panu
parent bd6e4ec786
commit 5cefe7f5f3
290 changed files with 7976 additions and 8520 deletions
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49
examples/c++/flex.cxx
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@@ -22,45 +22,46 @@
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <unistd.h>
#include <iostream>
#include <signal.h>
#include "flex.hpp"
#include "upm_utilities.h"
using namespace std;
bool shouldRun = true;
void sig_handler(int signo)
void
sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
if (signo == SIGINT)
shouldRun = false;
}
int main()
int
main()
{
signal(SIGINT, sig_handler);
signal(SIGINT, sig_handler);
//! [Interesting]
// The was tested with a Spectra Symbol flex sensor.
// We attached a 22K resistor to a breadboard,
// with 1 end attached to GND and the other connected to
// both the flex sensor and A0.
// The flex sensor was connected on 1 pin to the 22K resistor and A0
// and on the other pin to 5V.
//! [Interesting]
// The was tested with a Spectra Symbol flex sensor.
// We attached a 22K resistor to a breadboard,
// with 1 end attached to GND and the other connected to
// both the flex sensor and A0.
// The flex sensor was connected on 1 pin to the 22K resistor and A0
// and on the other pin to 5V.
// Instantiate a Flex sensor on analog pin A0
upm::Flex *flex = new upm::Flex(0);
while (shouldRun)
{
cout << "Flex value: " << flex->value() << endl;
sleep(1);
// Instantiate a Flex sensor on analog pin A0
upm::Flex flex(0);
while (shouldRun) {
cout << "Flex value: " << flex.value() << endl;
upm_delay(1);
}
//! [Interesting]
//! [Interesting]
cout << "Exiting" << endl;
cout << "Exiting" << endl;
delete flex;
return 0;
return 0;
}