PyTime C API¶
Added in version 3.13.
时钟 C API 提供对系统时钟的访问。它类似于 Python time
模块。
有关与 datetime
模块相关的 C API,请参阅 DateTime 对象。
类型¶
-
type PyTime_t¶
以纳秒为单位的时间戳或持续时间,表示为带符号的 64 位整数。
时间戳的参考点取决于所使用的时钟。 例如,
PyTime_Time()
返回相对于 UNIX 纪元的时间戳。支持的范围约为[-292.3年; +292.3 年]。以Unix纪元(1970年1月1日)为参考,支持的日期范围约为[1677-09-21; 2262-04-11]。确切的限制以常数形式公开:
时钟函数¶
以下函数采用指向 PyTime_t 的指针,并将其设置为特定时钟的值。 每个时钟的详细信息在相应的 Python 函数的文档中给出。
成功时函数返回``0``,失败时返回``-1``(设置一个异常)。
在整数溢出时,他们设置 PyExc_OverflowError
异常,并将``*result``设置为``[PyTime_MIN; PyTime_MAX]``范围内的值。 (在当前系统上,整数溢出可能是由于系统时间配置错误引起的。)
As any other C API (unless otherwise specified), the functions must be called with an attached thread state.
-
int PyTime_Monotonic(PyTime_t *result)¶
读取单调时间。有关该时钟的重要详细信息,请参阅
time.monotonic()
。
-
int PyTime_PerfCounter(PyTime_t *result)¶
读取性能计数器。有关该时钟的重要详细信息,请参阅
time.perf_counter()
。
原始时钟函数¶
Similar to clock functions, but don't set an exception on error and don't require the caller to have an attached thread state.
成功时,函数返回 0
。
On failure, they set *result
to 0
and return -1
, without setting
an exception. To get the cause of the error, attach a thread state,
and call the regular (non-Raw
) function. Note that the regular function may succeed after
the Raw
one failed.
-
int PyTime_MonotonicRaw(PyTime_t *result)¶
Similar to
PyTime_Monotonic()
, but don't set an exception on error and don't require an attached thread state.
-
int PyTime_PerfCounterRaw(PyTime_t *result)¶
Similar to
PyTime_PerfCounter()
, but don't set an exception on error and don't require an attached thread state.
-
int PyTime_TimeRaw(PyTime_t *result)¶
Similar to
PyTime_Time()
, but don't set an exception on error and don't require an attached thread state.