This header was originally in the C standard library as <time.h>
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This header is part of the C-style date and time library.
number of processor clock ticks per second (macro constant) |
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implementation-defined null pointer constant (macro constant) |
process running time (typedef) |
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unsigned integer type returned by the sizeof operator (typedef) |
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time since epoch type (typedef) |
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calendar time type (class) |
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(since C++17) | time in seconds and nanoseconds (struct) |
Time manipulation |
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returns raw processor clock time since the program is started (function) |
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returns the current time of the system as time since epoch (function) |
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computes the difference between times (function) |
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(since C++17) | returns the calendar time based on a given time base (function) |
Format conversions |
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converts a time_t object to a textual representation (function) |
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converts a tm object to a textual representation (function) |
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converts a tm object to custom textual representation (function) |
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converts a tm object to custom wide string textual representation (function) |
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converts time since epoch to calendar time expressed as Universal Coordinated Time (function) |
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converts time since epoch to calendar time expressed as local time (function) |
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converts calendar time to time since epoch (function) |
#define NULL /* see definition */ #define CLOCKS_PER_SEC /* see definition */ #define TIME_UTC /* see definition */ namespace std { using size_t = /* see definition */; using clock_t = /* see definition */; using time_t = /* see definition */; struct timespec; struct tm; clock_t clock(); double difftime(time_t time1, time_t time0); time_t mktime(struct tm* timeptr); time_t time(time_t* timer); int timespec_get(timespec* ts, int base); char* asctime(const struct tm* timeptr); char* ctime(const time_t* timer); struct tm* gmtime(const time_t* timer); struct tm* localtime(const time_t* timer); size_t strftime(char* s, size_t maxsize, const char* format, const struct tm* timeptr); }
std::timespec
struct timespec { std::time_t tv_sec; long tv_nsec; };
std::tm
struct tm { int tm_sec; int tm_min int tm_hour; int tm_mday; int tm_mon; int tm_year; int tm_wday; int tm_yday; int tm_isdst; };
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