fix build failures due to signed vs unsigned warnings

Signed-off-by: Daniel A. Steffen <dsteffen@apple.com>

Author: das

src/apply.c

@@ -234,20 +234,21 @@ dispatch_apply_f(size_t iterations, dispatch_queue_t dq, void *ctxt,
 	if (slowpath(iterations == 0)) {
 		return;
 	}
-	int32_t thr_cnt = dispatch_hw_config(active_cpus);
-	dispatch_thread_context_t dtctxt = _dispatch_thread_context_find(_dispatch_apply_key);
+	int32_t thr_cnt = (int32_t)dispatch_hw_config(active_cpus);
+	dispatch_thread_context_t dtctxt =
+			_dispatch_thread_context_find(_dispatch_apply_key);
 	size_t nested = dtctxt ? dtctxt->dtc_apply_nesting : 0;
 	dispatch_queue_t old_dq = _dispatch_queue_get_current();
 
 	if (!slowpath(nested)) {
 		nested = iterations;
 	} else {
-		thr_cnt = nested < thr_cnt ? thr_cnt / nested : 1;
+		thr_cnt = nested < (size_t)thr_cnt ? thr_cnt / (int32_t)nested : 1;
 		nested = nested < DISPATCH_APPLY_MAX && iterations < DISPATCH_APPLY_MAX
 				? nested * iterations : DISPATCH_APPLY_MAX;
 	}
-	if (iterations < thr_cnt) {
-		thr_cnt = iterations;
+	if (iterations < (size_t)thr_cnt) {
+		thr_cnt = (int32_t)iterations;
 	}
 	if (slowpath(dq == DISPATCH_APPLY_CURRENT_ROOT_QUEUE)) {
 		dq = old_dq ? old_dq : _dispatch_get_root_queue(

src/inline_internal.h

@@ -592,30 +592,30 @@ _dq_state_has_side_suspend_cnt(uint64_t dq_state)
 }
 
 DISPATCH_ALWAYS_INLINE
-static inline uint32_t
+static inline int32_t
 _dq_state_extract_width_bits(uint64_t dq_state)
 {
 	dq_state &= DISPATCH_QUEUE_WIDTH_MASK;
-	return (uint32_t)(dq_state >> DISPATCH_QUEUE_WIDTH_SHIFT);
+	return (int32_t)(dq_state >> DISPATCH_QUEUE_WIDTH_SHIFT);
 }
 
 DISPATCH_ALWAYS_INLINE
-static inline uint32_t
+static inline int32_t
 _dq_state_available_width(uint64_t dq_state)
 {
-	uint32_t full = DISPATCH_QUEUE_WIDTH_FULL;
+	int32_t full = DISPATCH_QUEUE_WIDTH_FULL;
 	if (likely(!(dq_state & DISPATCH_QUEUE_WIDTH_FULL_BIT))) {
 		return full - _dq_state_extract_width_bits(dq_state);
 	}
 	return 0;
 }
 
 DISPATCH_ALWAYS_INLINE
-static inline uint32_t
+static inline int32_t
 _dq_state_used_width(uint64_t dq_state, uint16_t dq_width)
 {
-	uint32_t full = DISPATCH_QUEUE_WIDTH_FULL;
-	uint32_t width = _dq_state_extract_width_bits(dq_state);
+	int32_t full = DISPATCH_QUEUE_WIDTH_FULL;
+	int32_t width = _dq_state_extract_width_bits(dq_state);
 
 	if (dq_state & DISPATCH_QUEUE_PENDING_BARRIER) {
 		// DISPATCH_QUEUE_PENDING_BARRIER means (dq_width - 1) of the used width
@@ -1030,21 +1030,21 @@ _dispatch_queue_try_reserve_sync_width(dispatch_queue_t dq)
  * possibly 0
  */
 DISPATCH_ALWAYS_INLINE DISPATCH_WARN_RESULT
-static inline uint32_t
-_dispatch_queue_try_reserve_apply_width(dispatch_queue_t dq, uint32_t da_width)
+static inline int32_t
+_dispatch_queue_try_reserve_apply_width(dispatch_queue_t dq, int32_t da_width)
 {
 	uint64_t old_state, new_state;
-	uint32_t width;
+	int32_t width;
 
 	(void)os_atomic_rmw_loop2o(dq, dq_state, old_state, new_state, relaxed, {
-		width = _dq_state_available_width(old_state);
+		width = (int32_t)_dq_state_available_width(old_state);
 		if (unlikely(!width)) {
 			os_atomic_rmw_loop_give_up(return 0);
 		}
 		if (width > da_width) {
 			width = da_width;
 		}
-		new_state = old_state + width * DISPATCH_QUEUE_WIDTH_INTERVAL;
+		new_state = old_state + (uint64_t)width * DISPATCH_QUEUE_WIDTH_INTERVAL;
 	});
 	return width;
 }
@@ -1055,10 +1055,10 @@ _dispatch_queue_try_reserve_apply_width(dispatch_queue_t dq, uint32_t da_width)
  */
 DISPATCH_ALWAYS_INLINE
 static inline void
-_dispatch_queue_relinquish_width(dispatch_queue_t dq, uint32_t da_width)
+_dispatch_queue_relinquish_width(dispatch_queue_t dq, int32_t da_width)
 {
 	(void)os_atomic_sub2o(dq, dq_state,
-			da_width * DISPATCH_QUEUE_WIDTH_INTERVAL, relaxed);
+			(uint64_t)da_width * DISPATCH_QUEUE_WIDTH_INTERVAL, relaxed);
 }
 
 /* Used by target-queue recursing code
@@ -1474,7 +1474,7 @@ _dispatch_queue_push_update_head(dispatch_queue_t dq,
 DISPATCH_ALWAYS_INLINE
 static inline void
 _dispatch_root_queue_push_inline(dispatch_queue_t dq, dispatch_object_t _head,
-		dispatch_object_t _tail, unsigned int n)
+		dispatch_object_t _tail, int n)
 {
 	struct dispatch_object_s *head = _head._do, *tail = _tail._do;
 	if (unlikely(_dispatch_queue_push_update_tail_list(dq, head, tail))) {

src/queue.c

@@ -694,7 +694,7 @@ _dispatch_root_queue_init_pthread_pool(dispatch_root_queue_context_t qc,
 {
 	dispatch_pthread_root_queue_context_t pqc = qc->dgq_ctxt;
 	int32_t thread_pool_size = overcommit ? DISPATCH_WORKQ_MAX_PTHREAD_COUNT :
-			dispatch_hw_config(active_cpus);
+			(int32_t)dispatch_hw_config(active_cpus);
 	if (slowpath(pool_size) && pool_size < thread_pool_size) {
 		thread_pool_size = pool_size;
 	}

src/trace.h

@@ -132,7 +132,7 @@ _dispatch_trace_client_callout2(void *ctxt, size_t i, void (*f)(void *, size_t))
 DISPATCH_ALWAYS_INLINE
 static inline void
 _dispatch_trace_root_queue_push_list(dispatch_queue_t dq,
-		dispatch_object_t _head, dispatch_object_t _tail, unsigned int n)
+		dispatch_object_t _head, dispatch_object_t _tail, int n)
 {
 	if (slowpath(DISPATCH_QUEUE_PUSH_ENABLED())) {
 		struct dispatch_object_s *dou = _head._do;