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authorGravatar Craig Tiller <ctiller@google.com>2016-07-13 08:43:31 -0700
committerGravatar Craig Tiller <ctiller@google.com>2016-07-13 08:43:31 -0700
commit89a717f615528866732c3facd7a375dd89d2b0b9 (patch)
tree176b14bea274a077f558e01805da94e1e9a886ec /src/core
parentb5ee1cdcb94fde937f84346eedc1efe2a25a373b (diff)
parent286ff57ffd8afdbbc954dc03cb1931fe7560224e (diff)
Merge github.com:grpc/grpc into delayed-write
Diffstat (limited to 'src/core')
-rw-r--r--src/core/lib/support/time.c122
1 files changed, 43 insertions, 79 deletions
diff --git a/src/core/lib/support/time.c b/src/core/lib/support/time.c
index 57f8331194..5a7d043aed 100644
--- a/src/core/lib/support/time.c
+++ b/src/core/lib/support/time.c
@@ -80,103 +80,67 @@ gpr_timespec gpr_inf_past(gpr_clock_type type) {
return out;
}
-/* TODO(ctiller): consider merging _nanos, _micros, _millis into a single
- function for maintainability. Similarly for _seconds, _minutes, and _hours */
-
-gpr_timespec gpr_time_from_nanos(int64_t ns, gpr_clock_type type) {
- gpr_timespec result;
- result.clock_type = type;
- if (ns == INT64_MAX) {
- result = gpr_inf_future(type);
- } else if (ns == INT64_MIN) {
- result = gpr_inf_past(type);
- } else if (ns >= 0) {
- result.tv_sec = ns / GPR_NS_PER_SEC;
- result.tv_nsec = (int32_t)(ns - result.tv_sec * GPR_NS_PER_SEC);
+static gpr_timespec to_seconds_from_sub_second_time(int64_t time_in_units,
+ int64_t units_per_sec,
+ gpr_clock_type type) {
+ gpr_timespec out;
+ if (time_in_units == INT64_MAX) {
+ out = gpr_inf_future(type);
+ } else if (time_in_units == INT64_MIN) {
+ out = gpr_inf_past(type);
} 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 = (int32_t)(ns - result.tv_sec * GPR_NS_PER_SEC);
+ if (time_in_units >= 0) {
+ out.tv_sec = time_in_units / units_per_sec;
+ } else {
+ out.tv_sec = (-((units_per_sec - 1) - (time_in_units + units_per_sec)) /
+ units_per_sec) -
+ 1;
+ }
+ out.tv_nsec = (int32_t)((time_in_units - out.tv_sec * units_per_sec) *
+ GPR_NS_PER_SEC / units_per_sec);
+ out.clock_type = type;
}
- return result;
+ return out;
}
-gpr_timespec gpr_time_from_micros(int64_t us, gpr_clock_type type) {
- gpr_timespec result;
- result.clock_type = type;
- if (us == INT64_MAX) {
- result = gpr_inf_future(type);
- } else if (us == INT64_MIN) {
- result = gpr_inf_past(type);
- } else if (us >= 0) {
- result.tv_sec = us / 1000000;
- result.tv_nsec = (int32_t)((us - result.tv_sec * 1000000) * 1000);
+static gpr_timespec to_seconds_from_above_second_time(int64_t time_in_units,
+ int64_t secs_per_unit,
+ gpr_clock_type type) {
+ gpr_timespec out;
+ if (time_in_units >= INT64_MAX / secs_per_unit) {
+ out = gpr_inf_future(type);
+ } else if (time_in_units <= INT64_MIN / secs_per_unit) {
+ out = gpr_inf_past(type);
} else {
- /* Calculation carefully formulated to avoid any possible under/overflow. */
- result.tv_sec = (-(999999 - (us + 1000000)) / 1000000) - 1;
- result.tv_nsec = (int32_t)((us - result.tv_sec * 1000000) * 1000);
+ out.tv_sec = time_in_units * secs_per_unit;
+ out.tv_nsec = 0;
+ out.clock_type = type;
}
- return result;
+ return out;
+}
+
+gpr_timespec gpr_time_from_nanos(int64_t ns, gpr_clock_type type) {
+ return to_seconds_from_sub_second_time(ns, GPR_NS_PER_SEC, type);
+}
+
+gpr_timespec gpr_time_from_micros(int64_t us, gpr_clock_type type) {
+ return to_seconds_from_sub_second_time(us, GPR_US_PER_SEC, type);
}
gpr_timespec gpr_time_from_millis(int64_t ms, gpr_clock_type type) {
- gpr_timespec result;
- result.clock_type = type;
- if (ms == INT64_MAX) {
- result = gpr_inf_future(type);
- } else if (ms == INT64_MIN) {
- result = gpr_inf_past(type);
- } else if (ms >= 0) {
- result.tv_sec = ms / 1000;
- result.tv_nsec = (int32_t)((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 = (int32_t)((ms - result.tv_sec * 1000) * 1000000);
- }
- return result;
+ return to_seconds_from_sub_second_time(ms, GPR_MS_PER_SEC, type);
}
gpr_timespec gpr_time_from_seconds(int64_t s, gpr_clock_type type) {
- gpr_timespec result;
- result.clock_type = type;
- if (s == INT64_MAX) {
- result = gpr_inf_future(type);
- } else if (s == INT64_MIN) {
- result = gpr_inf_past(type);
- } else {
- result.tv_sec = s;
- result.tv_nsec = 0;
- }
- return result;
+ return to_seconds_from_sub_second_time(s, 1, type);
}
gpr_timespec gpr_time_from_minutes(int64_t m, gpr_clock_type type) {
- gpr_timespec result;
- result.clock_type = type;
- if (m >= INT64_MAX / 60) {
- result = gpr_inf_future(type);
- } else if (m <= INT64_MIN / 60) {
- result = gpr_inf_past(type);
- } else {
- result.tv_sec = m * 60;
- result.tv_nsec = 0;
- }
- return result;
+ return to_seconds_from_above_second_time(m, 60, type);
}
gpr_timespec gpr_time_from_hours(int64_t h, gpr_clock_type type) {
- gpr_timespec result;
- result.clock_type = type;
- if (h >= INT64_MAX / 3600) {
- result = gpr_inf_future(type);
- } else if (h <= INT64_MIN / 3600) {
- result = gpr_inf_past(type);
- } else {
- result.tv_sec = h * 3600;
- result.tv_nsec = 0;
- }
- return result;
+ return to_seconds_from_above_second_time(h, 3600, type);
}
gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b) {