let me appologize in advance for being so vague about the problem. I can not share any details. It is a computer vision problem and a bunch of images are scanned and processed in main(). Every 100 (or so) frames the main() function spawns another thread, which scans the images in a different way (but the first step was requires).
#include <thread>
...
void myFunction(ImageVector, arg2, arg3)
{
for (i = 0; i < ImageVector.size < ++i)
{
process(ImageVector[i])
}
}
int main(void)
{
std::vector<std::string> images; // paths to the images, please consider it filled somehow, e.g. multiple push_backs
for (i = 0; i < Images.size ; ++i)
{
Scan(Images[i]). // Scans the image
Process(Images[i]) // Processes the image
if (Something)
{
std::vector<std::string> ImageVector(&Images[10], &Images[100]);
//Spawn the tread and put it into a vector.
MyThreads.push_back(std::thread(myFunction, ImageVector, arg2, arg3));
}
}
MyThreads[0].join(); // assuming only the first one is filled
}
The images are not the same and read from disk. Nevertheless I checked the reading logic and that is not the problem. If I execute the tasks after another, it works fine. Neither ImageVector, arg2, arg3 are pointers. They are just copies of variables.
Functions myFunction(), Scan(), Process() use similar code-pieces but none of these pieces has shared variables in them. There is also no malloc() as I was told this is not threadsafe, just "new" now.
I realize it is not much to go on but maybe I just forgot something simple.
Thank you
PS: I switched the threading library to boost with no effect,´.
