Added bitset macro ops

include/grpc/support/useful.h

@@ -52,4 +52,13 @@
     b = x;               \
   } while (0)
 
+/** Set the \a n-th bit of \a i */
+#define GPR_BITSET(i, n) (i |= (1u << n))
+
+/** Clear the \a n-th bit of \a i */
+#define GPR_BITCLEAR(i, n) (i &= ~(1u << n))
+
+/** Get the \a n-th bit of \a i */
+#define GPR_BITGET(i, n) ((i & (1u << n)) != 0)
+
 #endif  /* GRPC_SUPPORT_USEFUL_H */

test/core/support/useful_test.c

@@ -39,6 +39,7 @@
 int main(int argc, char **argv) {
   int four[4];
   int five[5];
+  gpr_uint32 bitset = 0;
   grpc_test_init(argc, argv);
 
   GPR_ASSERT(GPR_MIN(1, 2) == 1);
@@ -55,5 +56,11 @@ int main(int argc, char **argv) {
   GPR_ASSERT(GPR_ARRAY_SIZE(four) == 4);
   GPR_ASSERT(GPR_ARRAY_SIZE(five) == 5);
 
+  GPR_ASSERT(GPR_BITSET(bitset, 3) == 8);
+  GPR_ASSERT(GPR_BITGET(bitset, 3) == 1);
+  GPR_ASSERT(GPR_BITSET(bitset, 1) == 10);
+  GPR_ASSERT(GPR_BITCLEAR(bitset, 3) == 2);
+  GPR_ASSERT(GPR_BITGET(bitset, 3) == 0);
+
   return 0;
 }