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Utilities & Libraries
C Library Reference
I
iofunc_mount_set_time()
Set the timestamp resolution for iofunc functions and structures

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        Set the timestamp resolution for iofunc functions and structures
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        Verify a client's read access to a resource
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        Do permission checks for a _IO_CONNECT_RENAME message
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        Do permission checks for the _IO_SPACE message
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        Populate a stat structure
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        Default handler for _IO_STAT messages
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        Indicate if synchronization is needed
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        Default handler for _IO_SYNC messages
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        Verify permissions to sync
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        Update time stamps
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        Unblock OCBs
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        Default unblock handler
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        Verify that an entry can be unlinked
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        Default handler for the unlock_ocb callout
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        Update time stamps
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        Default handler for _IO_UTIME messages
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        Default handler for _IO_WRITE messages
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        Verify a client's write access to a resource
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        Arm a resource manager
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        Determine if a number is finite
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        Determine whether one floating-point number is greater than another
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        Test a character to see if it's a lowercase letter
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iofunc_mount_set_time()

QNX SDP8.0C Library ReferenceAPIDeveloper

Set the timestamp resolution for iofunc functions and structures

Synopsis:

#include <sys/iofunc.h>

int iofunc_mount_set_time ( IOFUNC_MOUNT_T * const mountp,
                            const uint32_t timeres );

Arguments:

mountp: A pointer to the mount structure (typically a iofunc_mount_t structure) that is associated with the resmgr_attach() function and for which you want to set the time resolution.
timeres: The resolution for the resource manager's timestamps in nanoseconds. Valid values are from 1 to UINT32_MAX.; For example, if the resource manager uses a timestamp resolution of 100 ms, specify 100000000 (100 million nanoseconds). If it uses a 50-microsecond timestamp, specify 50000.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The iofunc_mount_set_time() function specifies the timestamp resolution of the iofunc subsystem.

This is useful when you save timestamps to NTFS, which stores timestamps in millseconds only. (The POSIX standard requires timestamps of open files to use the same resolution as the file system.)

Returns:

0, or -1 if an error occurred (errno is set).

Classification:


Safety:
Cancellation point	No
Signal handler	Yes
Thread	Yes

Page updated: August 09, 2024