ck_array: Change semantics of put_unique return values.

More specifically, -1 should idiomatically indicate error.

doc/Makefile.in

@@ -7,7 +7,12 @@ BUILD_DIR=@BUILD_DIR@
 SRC_DIR=@SRC_DIR@
 HTML_SUFFIX=.html
 
-OBJECTS=ck_brlock			\
+OBJECTS=ck_array_commit			\
+	ck_array_init			\
+	ck_array_put			\
+	ck_array_put_unique		\
+	ck_array_remove			\
+	ck_brlock			\
 	ck_ht_count 	  		\
 	ck_ht_destroy	  		\
 	ck_ht_get_spmc	  		\

regressions/ck_array/validate/serial.c

@@ -124,10 +124,10 @@ main(void)
 	if (ck_array_put_unique(&array, (void *)UINTPTR_MAX) != 0)
 		ck_error("Unique value put failed.\n");
 
-	if (ck_array_put_unique(&array, (void *)(uintptr_t)4) != -1)
+	if (ck_array_put_unique(&array, (void *)(uintptr_t)4) != 1)
 		ck_error("put of 4 not detected as non-unique.\n");
 
-	if (ck_array_put_unique(&array, (void *)UINTPTR_MAX) != -1)
+	if (ck_array_put_unique(&array, (void *)UINTPTR_MAX) != 1)
 		ck_error("put of UINTPTR_MAX not detected as non-unique.\n");
 
 	ck_array_commit(&array);
@@ -153,7 +153,7 @@ main(void)
 
 	for (i = 0; i < ITERATION * 128; i++) {
 		ck_array_put(&array, (void *)i);
-		if (ck_array_put_unique(&array, (void *)i) != -1)
+		if (ck_array_put_unique(&array, (void *)i) != 1)
 			ck_error("put_unique for non-unique value should fail.\n");
 	}
 

src/ck_array.c

@@ -140,10 +140,10 @@ ck_array_put_unique(struct ck_array *array, void *value)
 
 	for (i = 0; i < limit; i++) {
 		if (v[i] == value)
-			return -1;
+			return 1;
 	}
 
-	return !ck_array_put(array, value);
+	return -!ck_array_put(array, value);
 }
 
 bool