From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- nsprpub/pr/include/prinrval.h | 146 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 146 insertions(+) create mode 100644 nsprpub/pr/include/prinrval.h (limited to 'nsprpub/pr/include/prinrval.h') diff --git a/nsprpub/pr/include/prinrval.h b/nsprpub/pr/include/prinrval.h new file mode 100644 index 000000000..14cd39b63 --- /dev/null +++ b/nsprpub/pr/include/prinrval.h @@ -0,0 +1,146 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* +** File: prinrval.h +** Description: API to interval timing functions of NSPR. +** +** +** NSPR provides interval times that are independent of network time +** of day values. Interval times are (in theory) accurate regardless +** of host processing requirements and also very cheap to acquire. It +** is expected that getting an interval time while in a synchronized +** function (holding one's lock). +**/ + +#if !defined(prinrval_h) +#define prinrval_h + +#include "prtypes.h" + +PR_BEGIN_EXTERN_C + +/**********************************************************************/ +/************************* TYPES AND CONSTANTS ************************/ +/**********************************************************************/ + +typedef PRUint32 PRIntervalTime; + +/*********************************************************************** +** DEFINES: PR_INTERVAL_MIN +** PR_INTERVAL_MAX +** DESCRIPTION: +** These two constants define the range (in ticks / second) of the +** platform dependent type, PRIntervalTime. These constants bound both +** the period and the resolution of a PRIntervalTime. +***********************************************************************/ +#define PR_INTERVAL_MIN 1000UL +#define PR_INTERVAL_MAX 100000UL + +/*********************************************************************** +** DEFINES: PR_INTERVAL_NO_WAIT +** PR_INTERVAL_NO_TIMEOUT +** DESCRIPTION: +** Two reserved constants are defined in the PRIntervalTime namespace. +** They are used to indicate that the process should wait no time (return +** immediately) or wait forever (never time out), respectively. +** Note: PR_INTERVAL_NO_TIMEOUT passed as input to PR_Connect is +** interpreted as use the OS's connect timeout. +** +***********************************************************************/ +#define PR_INTERVAL_NO_WAIT 0UL +#define PR_INTERVAL_NO_TIMEOUT 0xffffffffUL + +/**********************************************************************/ +/****************************** FUNCTIONS *****************************/ +/**********************************************************************/ + +/*********************************************************************** +** FUNCTION: PR_IntervalNow +** DESCRIPTION: +** Return the value of NSPR's free running interval timer. That timer +** can be used to establish epochs and determine intervals (be computing +** the difference between two times). +** INPUTS: void +** OUTPUTS: void +** RETURN: PRIntervalTime +** +** SIDE EFFECTS: +** None +** RESTRICTIONS: +** The units of PRIntervalTime are platform dependent. They are chosen +** such that they are appropriate for the host OS, yet provide sufficient +** resolution and period to be useful to clients. +** MEMORY: N/A +** ALGORITHM: Platform dependent +***********************************************************************/ +NSPR_API(PRIntervalTime) PR_IntervalNow(void); + +/*********************************************************************** +** FUNCTION: PR_TicksPerSecond +** DESCRIPTION: +** Return the number of ticks per second for PR_IntervalNow's clock. +** The value will be in the range [PR_INTERVAL_MIN..PR_INTERVAL_MAX]. +** INPUTS: void +** OUTPUTS: void +** RETURN: PRUint32 +** +** SIDE EFFECTS: +** None +** RESTRICTIONS: +** None +** MEMORY: N/A +** ALGORITHM: N/A +***********************************************************************/ +NSPR_API(PRUint32) PR_TicksPerSecond(void); + +/*********************************************************************** +** FUNCTION: PR_SecondsToInterval +** PR_MillisecondsToInterval +** PR_MicrosecondsToInterval +** DESCRIPTION: +** Convert standard clock units to platform dependent intervals. +** INPUTS: PRUint32 +** OUTPUTS: void +** RETURN: PRIntervalTime +** +** SIDE EFFECTS: +** None +** RESTRICTIONS: +** Conversion may cause overflow, which is not reported. +** MEMORY: N/A +** ALGORITHM: N/A +***********************************************************************/ +NSPR_API(PRIntervalTime) PR_SecondsToInterval(PRUint32 seconds); +NSPR_API(PRIntervalTime) PR_MillisecondsToInterval(PRUint32 milli); +NSPR_API(PRIntervalTime) PR_MicrosecondsToInterval(PRUint32 micro); + +/*********************************************************************** +** FUNCTION: PR_IntervalToSeconds +** PR_IntervalToMilliseconds +** PR_IntervalToMicroseconds +** DESCRIPTION: +** Convert platform dependent intervals to standard clock units. +** INPUTS: PRIntervalTime +** OUTPUTS: void +** RETURN: PRUint32 +** +** SIDE EFFECTS: +** None +** RESTRICTIONS: +** Conversion may cause overflow, which is not reported. +** MEMORY: N/A +** ALGORITHM: N/A +***********************************************************************/ +NSPR_API(PRUint32) PR_IntervalToSeconds(PRIntervalTime ticks); +NSPR_API(PRUint32) PR_IntervalToMilliseconds(PRIntervalTime ticks); +NSPR_API(PRUint32) PR_IntervalToMicroseconds(PRIntervalTime ticks); + +PR_END_EXTERN_C + + +#endif /* !defined(prinrval_h) */ + +/* prinrval.h */ -- cgit v1.2.3