1 files changed, 15 insertions, 1 deletions

diff --git a/src/nissy.c b/src/nissy.c
index f933cab..5d009ba 100644
--- a/src/nissy.c
+++ b/src/nissy.c
@@ -489,6 +489,7 @@ nissy_solve(
         unsigned maxmoves,
         unsigned maxsols,
         int optimal,
+        int threads,
         unsigned long long data_size,
         const char data[data_size],
         unsigned sols_size,
@@ -499,6 +500,7 @@ nissy_solve(
         cube_t c;
         long long parse_ret;
         uint8_t h, k;
+        int t;
 
         if (solver == NULL) {
                 LOG("Error: 'solver' argument is NULL\n");
@@ -522,10 +524,22 @@ nissy_solve(
                 return 0;
         }
 
+        t = threads == 0 ? THREADS : threads;
+        if (t < 0) {
+                LOG("solve: 'threads' is negative. Please provide a "
+                    "number of threads between 1 and %d\n", THREADS);
+                return NISSY_ERROR_OPTIONS;
+        } 
+        if (t > THREADS) {
+                LOG("solve: 'threads' is above the maximum value of %d\n",
+                    THREADS);
+                return NISSY_ERROR_OPTIONS;
+        }
+
         if (!strncmp(solver, "h48", 3)) {
                 parse_ret = parse_h48_solver(solver, &h, &k);
                 if (parse_ret == NISSY_OK)
-                        return solve_h48(c, minmoves, maxmoves, maxsols,
+                        return solve_h48(c, minmoves, maxmoves, maxsols, t,
                                 data_size, data, sols_size, sols, stats);
                 else
                         return parse_ret;