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Code Issues Releases Activity

src/main.cpp: in thread_search() handle edge case where number of search results is less than number of threads.

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This commit is contained in:
Henrik Hautakoski 2020-01-10 07:31:45 +01:00
parent 88638d0e94
commit 56fd5eecbc
1 changed files with 19 additions and 6 deletions
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25
src/main.cpp
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@ -43,12 +43,25 @@ static int n_threads = std::thread::hardware_concurrency();
#define search_func thread_search
static void thread_search(const strlist_t& words, int n) {
// create n_threads - 1 as we use main process also.
std::vector<std::thread> t(n_threads - 1);
// divide the number of results for all threads.
int d = n / n_threads;
// Also calculate the reminder (will be assigned to the main thread)
int m = n % n_threads;
std::vector<std::thread> t;
int d, m;
// We can use all threads
if (n >= n_threads) {
// create n_threads - 1 as we use main process also.
t.resize(n_threads - 1);
// divide the number of results for all threads.
d = n / n_threads;
// Also calculate the reminder (will be assigned to the main thread)
m = n % n_threads;
}
// not enough results to use all threads.
else {
t.resize(n);
d = 1;
m = 0;
}
// Launch threads.
for(int i = 0; i < t.size(); i++) {