make gpr_timespec platform agnostic

1 files changed, 24 insertions, 40 deletions

diff --git a/src/core/support/time.c b/src/core/support/time.c
index 929adac918..197fa9ad44 100644
--- a/src/core/support/time.c
+++ b/src/core/support/time.c
@@ -56,22 +56,6 @@ gpr_timespec gpr_time_max(gpr_timespec a, gpr_timespec b) {
   return gpr_time_cmp(a, b) > 0 ? a : b;
 }
 
-/* There's no standard TIME_T_MIN and TIME_T_MAX, so we construct them.  The
-   following assumes that signed types are two's-complement and that bytes are
-   8 bits.  */
-
-/* The top bit of integral type t. */
-#define TOP_BIT_OF_TYPE(t) (((gpr_uintmax)1) << ((8 * sizeof(t)) - 1))
-
-/* Return whether integral type t is signed. */
-#define TYPE_IS_SIGNED(t) (((t)1) > (t) ~(t)0)
-
-/* The minimum and maximum value of integral type t. */
-#define TYPE_MIN(t) ((t)(TYPE_IS_SIGNED(t) ? TOP_BIT_OF_TYPE(t) : 0))
-#define TYPE_MAX(t)                                 \
-  ((t)(TYPE_IS_SIGNED(t) ? (TOP_BIT_OF_TYPE(t) - 1) \
-                         : ((TOP_BIT_OF_TYPE(t) - 1) << 1) + 1))
-
 gpr_timespec gpr_time_0(gpr_clock_type type) {
   gpr_timespec out;
   out.tv_sec = 0;
@@ -82,7 +66,7 @@ gpr_timespec gpr_time_0(gpr_clock_type type) {
 
 gpr_timespec gpr_inf_future(gpr_clock_type type) {
   gpr_timespec out;
-  out.tv_sec = TYPE_MAX(time_t);
+  out.tv_sec = INT64_MAX;
   out.tv_nsec = 0;
   out.clock_type = type;
   return out;
@@ -90,7 +74,7 @@ gpr_timespec gpr_inf_future(gpr_clock_type type) {
 
 gpr_timespec gpr_inf_past(gpr_clock_type type) {
   gpr_timespec out;
-  out.tv_sec = TYPE_MIN(time_t);
+  out.tv_sec = INT64_MIN;
   out.tv_nsec = 0;
   out.clock_type = type;
   return out;
@@ -108,11 +92,11 @@ gpr_timespec gpr_time_from_nanos(long ns, gpr_clock_type type) {
     result = gpr_inf_past(type);
   } else if (ns >= 0) {
     result.tv_sec = ns / GPR_NS_PER_SEC;
-    result.tv_nsec = (int)(ns - result.tv_sec * GPR_NS_PER_SEC);
+    result.tv_nsec = (gpr_int32)(ns - result.tv_sec * GPR_NS_PER_SEC);
   } else {
     /* Calculation carefully formulated to avoid any possible under/overflow. */
     result.tv_sec = (-(999999999 - (ns + GPR_NS_PER_SEC)) / GPR_NS_PER_SEC) - 1;
-    result.tv_nsec = (int)(ns - result.tv_sec * GPR_NS_PER_SEC);
+    result.tv_nsec = (gpr_int32)(ns - result.tv_sec * GPR_NS_PER_SEC);
   }
   return result;
 }
@@ -126,11 +110,11 @@ gpr_timespec gpr_time_from_micros(long us, gpr_clock_type type) {
     result = gpr_inf_past(type);
   } else if (us >= 0) {
     result.tv_sec = us / 1000000;
-    result.tv_nsec = (int)((us - result.tv_sec * 1000000) * 1000);
+    result.tv_nsec = (gpr_int32)((us - result.tv_sec * 1000000) * 1000);
   } else {
     /* Calculation carefully formulated to avoid any possible under/overflow. */
     result.tv_sec = (-(999999 - (us + 1000000)) / 1000000) - 1;
-    result.tv_nsec = (int)((us - result.tv_sec * 1000000) * 1000);
+    result.tv_nsec = (gpr_int32)((us - result.tv_sec * 1000000) * 1000);
   }
   return result;
 }
@@ -144,11 +128,11 @@ gpr_timespec gpr_time_from_millis(long ms, gpr_clock_type type) {
     result = gpr_inf_past(type);
   } else if (ms >= 0) {
     result.tv_sec = ms / 1000;
-    result.tv_nsec = (int)((ms - result.tv_sec * 1000) * 1000000);
+    result.tv_nsec = (gpr_int32)((ms - result.tv_sec * 1000) * 1000000);
   } else {
     /* Calculation carefully formulated to avoid any possible under/overflow. */
     result.tv_sec = (-(999 - (ms + 1000)) / 1000) - 1;
-    result.tv_nsec = (int)((ms - result.tv_sec * 1000) * 1000000);
+    result.tv_nsec = (gpr_int32)((ms - result.tv_sec * 1000) * 1000000);
   }
   return result;
 }
@@ -197,7 +181,7 @@ gpr_timespec gpr_time_from_hours(long h, gpr_clock_type type) {
 
 gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b) {
   gpr_timespec sum;
-  int inc = 0;
+  gpr_int64 inc = 0;
   GPR_ASSERT(b.clock_type == GPR_TIMESPAN);
   sum.clock_type = a.clock_type;
   sum.tv_nsec = a.tv_nsec + b.tv_nsec;
@@ -205,17 +189,17 @@ gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b) {
     sum.tv_nsec -= GPR_NS_PER_SEC;
     inc++;
   }
-  if (a.tv_sec == TYPE_MAX(time_t) || a.tv_sec == TYPE_MIN(time_t)) {
+  if (a.tv_sec == INT64_MAX || a.tv_sec == INT64_MIN) {
     sum = a;
-  } else if (b.tv_sec == TYPE_MAX(time_t) ||
-             (b.tv_sec >= 0 && a.tv_sec >= TYPE_MAX(time_t) - b.tv_sec)) {
+  } else if (b.tv_sec == INT64_MAX ||
+             (b.tv_sec >= 0 && a.tv_sec >= INT64_MAX - b.tv_sec)) {
     sum = gpr_inf_future(sum.clock_type);
-  } else if (b.tv_sec == TYPE_MIN(time_t) ||
-             (b.tv_sec <= 0 && a.tv_sec <= TYPE_MIN(time_t) - b.tv_sec)) {
+  } else if (b.tv_sec == INT64_MIN ||
+             (b.tv_sec <= 0 && a.tv_sec <= INT64_MIN - b.tv_sec)) {
     sum = gpr_inf_past(sum.clock_type);
   } else {
     sum.tv_sec = a.tv_sec + b.tv_sec;
-    if (inc != 0 && sum.tv_sec == TYPE_MAX(time_t) - 1) {
+    if (inc != 0 && sum.tv_sec == INT64_MAX - 1) {
       sum = gpr_inf_future(sum.clock_type);
     } else {
       sum.tv_sec += inc;
@@ -226,7 +210,7 @@ gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b) {
 
 gpr_timespec gpr_time_sub(gpr_timespec a, gpr_timespec b) {
   gpr_timespec diff;
-  int dec = 0;
+  gpr_int64 dec = 0;
   if (b.clock_type == GPR_TIMESPAN) {
     diff.clock_type = a.clock_type;
   } else {
@@ -238,17 +222,17 @@ gpr_timespec gpr_time_sub(gpr_timespec a, gpr_timespec b) {
     diff.tv_nsec += GPR_NS_PER_SEC;
     dec++;
   }
-  if (a.tv_sec == TYPE_MAX(time_t) || a.tv_sec == TYPE_MIN(time_t)) {
+  if (a.tv_sec == INT64_MAX || a.tv_sec == INT64_MIN) {
     diff = a;
-  } else if (b.tv_sec == TYPE_MIN(time_t) ||
-             (b.tv_sec <= 0 && a.tv_sec >= TYPE_MAX(time_t) + b.tv_sec)) {
+  } else if (b.tv_sec == INT64_MIN ||
+             (b.tv_sec <= 0 && a.tv_sec >= INT64_MAX + b.tv_sec)) {
     diff = gpr_inf_future(GPR_CLOCK_REALTIME);
-  } else if (b.tv_sec == TYPE_MAX(time_t) ||
-             (b.tv_sec >= 0 && a.tv_sec <= TYPE_MIN(time_t) + b.tv_sec)) {
+  } else if (b.tv_sec == INT64_MAX ||
+             (b.tv_sec >= 0 && a.tv_sec <= INT64_MIN + b.tv_sec)) {
     diff = gpr_inf_past(GPR_CLOCK_REALTIME);
   } else {
     diff.tv_sec = a.tv_sec - b.tv_sec;
-    if (dec != 0 && diff.tv_sec == TYPE_MIN(time_t) + 1) {
+    if (dec != 0 && diff.tv_sec == INT64_MIN + 1) {
       diff = gpr_inf_past(GPR_CLOCK_REALTIME);
     } else {
       diff.tv_sec -= dec;
@@ -297,11 +281,11 @@ gpr_timespec gpr_convert_clock_type(gpr_timespec t, gpr_clock_type clock_type) {
   }
 
   if (t.tv_nsec == 0) {
-    if (t.tv_sec == TYPE_MAX(time_t)) {
+    if (t.tv_sec == INT64_MAX) {
       t.clock_type = clock_type;
       return t;
     }
-    if (t.tv_sec == TYPE_MIN(time_t)) {
+    if (t.tv_sec == INT64_MIN) {
       t.clock_type = clock_type;
       return t;
     }