From 168fc97045a866a22db0b2079c14fd2775e32387 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Thu, 21 Sep 2017 09:49:32 -0700
Subject: (untested) windows conversion to grpc_millis

---
 src/core/lib/iomgr/iocp_windows.c    | 24 ++++++++----------------
 src/core/lib/iomgr/iocp_windows.h    |  2 +-
 src/core/lib/iomgr/pollset_windows.c |  5 +++--
 3 files changed, 12 insertions(+), 19 deletions(-)

diff --git a/src/core/lib/iomgr/iocp_windows.c b/src/core/lib/iomgr/iocp_windows.c
index c082179c0b..3c38105ef9 100644
--- a/src/core/lib/iomgr/iocp_windows.c
+++ b/src/core/lib/iomgr/iocp_windows.c
@@ -40,25 +40,17 @@ static gpr_atm g_custom_events = 0;
 
 static HANDLE g_iocp;
 
-static DWORD deadline_to_millis_timeout(gpr_timespec deadline,
-                                        gpr_timespec now) {
+static DWORD deadline_to_millis_timeout(grpc_exec_ctx *exec_ctx,
+                                        grpc_millis deadline) {
   gpr_timespec timeout;
-  static const int64_t max_spin_polling_us = 10;
-  if (gpr_time_cmp(deadline, gpr_inf_future(deadline.clock_type)) == 0) {
+  if (deadline == GRPC_MILLIS_INF_FUTURE) == 0) {
     return INFINITE;
   }
-  if (gpr_time_cmp(deadline, gpr_time_add(now, gpr_time_from_micros(
-                                                   max_spin_polling_us,
-                                                   GPR_TIMESPAN))) <= 0) {
-    return 0;
-  }
-  timeout = gpr_time_sub(deadline, now);
-  return (DWORD)gpr_time_to_millis(gpr_time_add(
-      timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN)));
+  return (DWORD)GPR_MAX(0, deadline - grpc_exec_ctx_now(exec_ctx));
 }
 
 grpc_iocp_work_status grpc_iocp_work(grpc_exec_ctx *exec_ctx,
-                                     gpr_timespec deadline) {
+                                     grpc_millis deadline) {
   BOOL success;
   DWORD bytes = 0;
   DWORD flags = 0;
@@ -67,9 +59,9 @@ grpc_iocp_work_status grpc_iocp_work(grpc_exec_ctx *exec_ctx,
   grpc_winsocket *socket;
   grpc_winsocket_callback_info *info;
   GRPC_STATS_INC_SYSCALL_POLL(exec_ctx);
-  success = GetQueuedCompletionStatus(
-      g_iocp, &bytes, &completion_key, &overlapped,
-      deadline_to_millis_timeout(deadline, gpr_now(deadline.clock_type)));
+  success =
+      GetQueuedCompletionStatus(g_iocp, &bytes, &completion_key, &overlapped,
+                                deadline_to_millis_timeout(exec_ctx, deadline));
   if (success == 0 && overlapped == NULL) {
     return GRPC_IOCP_WORK_TIMEOUT;
   }
diff --git a/src/core/lib/iomgr/iocp_windows.h b/src/core/lib/iomgr/iocp_windows.h
index 9c89e868c5..4314ff2617 100644
--- a/src/core/lib/iomgr/iocp_windows.h
+++ b/src/core/lib/iomgr/iocp_windows.h
@@ -30,7 +30,7 @@ typedef enum {
 } grpc_iocp_work_status;
 
 grpc_iocp_work_status grpc_iocp_work(grpc_exec_ctx *exec_ctx,
-                                     gpr_timespec deadline);
+                                     grpc_millis deadline);
 void grpc_iocp_init(void);
 void grpc_iocp_kick(void);
 void grpc_iocp_flush(void);
diff --git a/src/core/lib/iomgr/pollset_windows.c b/src/core/lib/iomgr/pollset_windows.c
index eb295d3eeb..bb4df83fc1 100644
--- a/src/core/lib/iomgr/pollset_windows.c
+++ b/src/core/lib/iomgr/pollset_windows.c
@@ -110,7 +110,7 @@ void grpc_pollset_destroy(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {}
 
 grpc_error *grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                               grpc_pollset_worker **worker_hdl,
-                              gpr_timespec now, gpr_timespec deadline) {
+                              grpc_millis deadline) {
   grpc_pollset_worker worker;
   if (worker_hdl) *worker_hdl = &worker;
 
@@ -159,7 +159,8 @@ grpc_error *grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                       &worker);
     added_worker = 1;
     while (!worker.kicked) {
-      if (gpr_cv_wait(&worker.cv, &grpc_polling_mu, deadline)) {
+      if (gpr_cv_wait(&worker.cv, &grpc_polling_mu,
+                      grpc_millis_to_timespec(deadline, GPR_CLOCK_REALTIME))) {
         break;
       }
     }
-- 
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