This commit is contained in:
gabime
2016-08-22 20:54:18 +03:00
parent 20cb73e9da
commit b13735dc22
5 changed files with 253 additions and 251 deletions

View File

@@ -60,9 +60,9 @@ public:
using item_type = T;
mpmc_bounded_queue(size_t buffer_size)
:max_size_(buffer_size),
buffer_(new cell_t [buffer_size]),
buffer_mask_(buffer_size - 1)
:max_size_(buffer_size),
buffer_(new cell_t [buffer_size]),
buffer_mask_(buffer_size - 1)
{
//queue size must be power of two
if(!((buffer_size >= 2) && ((buffer_size & (buffer_size - 1)) == 0)))
@@ -133,15 +133,15 @@ public:
return true;
}
size_t approx_size()
{
size_t first_pos = dequeue_pos_.load(std::memory_order_relaxed);
size_t last_pos = enqueue_pos_.load(std::memory_order_relaxed);
if (last_pos <= first_pos)
return 0;
auto size = last_pos - first_pos;
return size < max_size_ ? size : max_size_;
}
size_t approx_size()
{
size_t first_pos = dequeue_pos_.load(std::memory_order_relaxed);
size_t last_pos = enqueue_pos_.load(std::memory_order_relaxed);
if (last_pos <= first_pos)
return 0;
auto size = last_pos - first_pos;
return size < max_size_ ? size : max_size_;
}
private:
struct cell_t
@@ -150,7 +150,7 @@ private:
T data_;
};
size_t const max_size_;
size_t const max_size_;
static size_t const cacheline_size = 64;
typedef char cacheline_pad_t [cacheline_size];
@@ -165,7 +165,7 @@ private:
cacheline_pad_t pad3_;
mpmc_bounded_queue(mpmc_bounded_queue const&) = delete;
void operator= (mpmc_bounded_queue const&) = delete;
void operator= (mpmc_bounded_queue const&) = delete;
};
} // ns details

View File

@@ -250,26 +250,28 @@ inline int utc_minutes_offset(const std::tm& tm = details::os::localtime())
offset -= tzinfo.StandardBias;
return offset;
#else
#if defined(sun) || defined(__sun)
// 'tm_gmtoff' field is BSD extension and it's missing on SunOS/Solaris
struct helper {
static long int calculate_gmt_offset(const std::tm & localtm = details::os::localtime(), const std::tm & gmtm = details::os::gmtime()) {
struct helper
{
static long int calculate_gmt_offset(const std::tm & localtm = details::os::localtime(), const std::tm & gmtm = details::os::gmtime())
{
int local_year = localtm.tm_year + (1900 - 1);
int gmt_year = gmtm.tm_year + (1900 - 1);
long int days = (
// difference in day of year
localtm.tm_yday - gmtm.tm_yday
// difference in day of year
localtm.tm_yday - gmtm.tm_yday
// + intervening leap days
+ ((local_year >> 2) - (gmt_year >> 2))
- (local_year / 100 - gmt_year / 100)
+ ((local_year / 100 >> 2) - (gmt_year / 100 >> 2))
// + intervening leap days
+ ((local_year >> 2) - (gmt_year >> 2))
- (local_year / 100 - gmt_year / 100)
+ ((local_year / 100 >> 2) - (gmt_year / 100 >> 2))
// + difference in years * 365 */
+ (long int)(local_year - gmt_year) * 365
);
// + difference in years * 365 */
+ (long int)(local_year - gmt_year) * 365
);
long int hours = (24 * days) + (localtm.tm_hour - gmtm.tm_hour);
long int mins = (60 * hours) + (localtm.tm_min - gmtm.tm_min);