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Unlocks pages that were previously locked in memory by the Lock Pages in Memory ($LCKPAG) service. Locked pages are automatically unlocked and deleted at image exit.
SYS$ULKPAG inadr ,[retadr] ,[acmode]
int sys$ulkpag (struct _va_range *inadr, struct _va_range *retadr, unsigned int acmode);
inadr
OpenVMS usage: address_range type: longword (unsigned) access: read only mechanism: by reference
Starting and ending virtual addresses of the pages to be unlocked. The inadr argument is the address of a 2-longword array containing, in order, the starting and ending process virtual addresses.Only the virtual page number portion of each virtual address is used; the low-order byte-within-page bits are ignored. If the starting and ending virtual addresses are the same, a single page is unlocked.
If more than one page is being unlocked and you need to determine specifically which pages had been previously unlocked, you should unlock the pages one at a time, that is, one page per call to $ULKPAG. The condition value returned by $ULKPAG indicates whether the page was previously unlocked.
retadr
OpenVMS usage: address_range type: longword (unsigned) access: write only mechanism: by reference---array reference or descriptor
Starting and ending process virtual addresses of the pages actually unlocked by $ULKPAG. The retadr argument is the address of a 2-longword array containing, in order, the starting and ending process virtual addresses.If an error occurs while multiple pages are being unlocked, retadr specifies those pages that were successfully unlocked before the error occurred. If no pages were successfully unlocked, both longwords in the retadr array contain the value --1.
acmode
OpenVMS usage: access_mode type: longword (unsigned) access: read only mechanism: by value
Access mode on behalf of which the request is being made. The acmode argument is a longword containing the access mode. The $PSLDEF macro defines the symbols for the four access modes.The most privileged access mode used is the access mode of the caller. To unlock any specified page, the resultant access mode must be equal to or more privileged than the access mode of the owner of that page.
The Unlock Pages from Memory service unlocks pages that were previously locked in memory by the Lock Pages in Memory ($LCKPAG) service. Locked pages are automatically unlocked and deleted at image exit.On Alpha and Integrity server systems, if you are attempting to unlock executable code, you should issue multiple $ULKPAG calls: one to unlock the code pages and others to unlock the linkage section references to these pages.
To call the $ULKPAG service, a process must have PSWAPM privilege.
None
For more information, see the chapter about memory management in the HP OpenVMS Programming Concepts Manual.
SS$_WASCLR The service completed successfully. At least one of the specified pages was previously unlocked. SS$_WASSET The service completed successfully. All of the specified pages were previously locked. SS$_ACCVIO The input array cannot be read by the caller; the output array cannot be written by the caller; or a page in the specified range is inaccessible or does not exist.
On Alpha and Integrity server systems, unlocks pages that were previously locked in memory by the Lock Pages in Memory ($LCKPAG_64) service.This service accepts 64-bit addresses.
SYS$ULKPAG_64 start_va_64 ,length_64 ,acmode ,return_va_64 ,return_length_64
int sys$ulkpag_64 (void *start_va_64, unsigned __int64 length_64, unsigned int acmode, void *(*(return_va_64)), unsigned __int64 *return_length_64);
start_va_64
OpenVMS usage: address type: quadword address access: read only mechanism: by value
The starting virtual address of the pages to be unlocked. The specified virtual address will be rounded down to a CPU-specific page boundary.length_64
OpenVMS usage: byte count type: quadword (unsigned) access: read only mechanism: by value
Length of the virtual address space to be unlocked. The specified length will be rounded up to a CPU-specific page boundary so that it includes all CPU-specific pages in the requested range.acmode
OpenVMS usage: access_mode type: longword (unsigned) access: read only mechanism: by value
Access mode on behalf of which the request is being made. The acmode argument is a longword containing the access mode.The $PSLDEF macro in STARLET.MLB and the file PSLDEF.H in SYS$STARLET_C.TLB define the following symbols and their values for the four access modes:
Value Symbolic Name Access Mode 0 PSL$C_KERNEL Kernel 1 PSL$C_EXEC Executive 2 PSL$C_SUPER Supervisor 3 PSL$C_USER User The most privileged access mode used is the access mode of the caller. To unlock any specified page, the resultant access mode must be equal to or more privileged than the access mode of the owner of that page.
return_va_64
OpenVMS usage: address type: quadword address access: write only mechanism: by 32- or 64-bit reference
The lowest process virtual address of the unlocked virtual address range. The return_va_64 argument is the 32- or 64-bit virtual address of a naturally aligned quadword into which the service returns the virtual address.return_length_64
OpenVMS usage: byte count type: quadword (unsigned) access: write only mechanism: by 32- or 64-bit reference
The length of the virtual address range unlocked. The return_length_64 argument is the 32- or 64-bit virtual address of a naturally aligned quadword into which the service returns the length of the virtual address range in bytes.
The Unlock Pages from Memory service unlocks pages that were previously locked in memory by the Lock Pages in Memory ($LCKPAG_64) service.If the condition value SS$_ACCVIO is returned by this service, a value cannot be returned in the memory locations pointed to by the return_va_64 and return_length_64 arguments.
If a condition value other than SS$_ACCVIO is returned, the returned address and returned length indicate the pages that were successfully unlocked before the error occurred. If no pages were unlocked, the return_va_64 argument will contain the value -1, and a value cannot be returned in the memory location pointed to by the return_length_64 argument.
To call the $ULKPAG_64 service, a process must have PSWAPM privilege.
None
$LCKPAG_64, $ULKPAG
SS$_WASCLR The service completed successfully. At least one of the specified pages was previously unlocked. SS$_WASSET The service completed successfully. All of the specified pages were previously locked in the working set. SS$_ACCVIO The return_va_64 or return_length_64 argument cannot be written by the caller, or an attempt was made to unlock pages by a caller whose access mode is less privileged than the access mode associated with the pages.
Unlocks pages that were previously locked in the working set by the Lock Pages in Working Set ($LKWSET) service.
SYS$ULWSET inadr ,[retadr] ,[acmode]
int sys$ulwset (struct _va_range *inadr, struct _va_range *retadr, unsigned int acmode);
inadr
OpenVMS usage: address_range type: longword (unsigned) access: read only mechanism: by reference---array reference or descriptor
Starting and ending virtual addresses of the pages to be unlocked. The inadr argument is the address of a 2-longword array containing, in order, the starting and ending process virtual addresses.Only the virtual page number portion of each virtual address is used; the low-order byte-within-page bits are ignored. If the starting and ending virtual address are the same, a single page is unlocked.
If more than one page is being unlocked and you need to determine specifically which pages had been previously unlocked, you should unlock the pages one at a time, that is, one page per call to $ULWSET. The condition value returned by $ULWSET indicates whether the page was previously unlocked.
On Alpha and Integrity server systems, if the first address in the 2-longword array is within an image mapped to your process, the entire image specified by the address is unlocked from the working set.
retadr
OpenVMS usage: address_range type: longword (unsigned) access: write only mechanism: by reference---array reference or descriptor
Starting and ending process virtual addresses of the pages that were actually unlocked by $CRMPSC. The retadr argument is the address of a 2-longword array containing, in order, the starting and ending process virtual addresses.If an error occurs while multiple pages are being unlocked, retadr specifies those pages that were successfully unlocked before the error occurred. If no pages were successfully unlocked, both longwords in the retadr array contain the value --1.
On Alpha and Integrity server systems, if the inadr argument specifies an address within an image mapped to your process, retadr specifies only one range of pages unlocked from the working set. Many ranges of pages might be unlocked.
acmode
OpenVMS usage: access_mode type: longword (unsigned) access: read only mechanism: by value
Access mode on behalf of which the request is being made. The acmode argument is a longword containing the access mode. The $PSLDEF macro defines the symbols for the four access modes.The most privileged access mode used is the access mode of the caller. To unlock any specified page, the resultant access mode must be equal to or more privileged than the access mode of the owner of that page.
The Unlock Pages from Working Set service unlocks pages that were previously locked in the working set by the Lock Pages in Working Set ($LKWSET) service. Unlocked pages become candidates for replacement within the working set of the process.On Alpha and Integrity server systems, if the first address specified to SYS$ULWSET is within an image mapped to your process, a success status indicates that the entire image containing the specified address is either unlocked from the working set, or the count of times the image has been locked in the working set has been decremented. This behavior helps to ensure that privileged processes entering kernel mode and raising IPL higher than IPL 2 do not access an invalid page and cause a PGFIPLHI bugcheck. The system keeps a count of the number of times each image within your process has been locked in the working set. This count is maintained so that calls to SYS$ULWSET unlock the image only when it has been called the same number of times as SYS$LKWSET.
The LIBRTL routines LIB$LOCK_IMAGE and LIB$UNLOCK_IMAGE are preferable to SYS$LKWSET and SYS$ULWSET for locking and unlocking code and related data in the working set. For more information about locking images in the working set, see the LIBRTL manual and the description of LIB$LOCK_IMAGE and LIB$UNLOCK_IMAGE.
None
None
$ADJSTK, $ADJWSL, $CRETVA, $CRMPSC, $DELTVA, $DGBLSC, $EXPREG, $LCKPAG, $LKWSET, $MGBLSC, $PURGWS, $SETPRT, $SETSTK, $SETSWM, $ULKPAG, $UPDSEC, $UPDSECW
SS$_WASCLR The service completed successfully. At least one of the specified pages was previously unlocked. SS$_WASSET The service completed successfully. All of the specified pages were previously locked in the working set. If the image has been locked in the working set, the count of times the image has been locked in the working set has been decremented. Only when the count is zero is the image unlocked from the working set. SS$_ACCVIO The inadr argument cannot be read by the caller; the retadr argument cannot be written by the caller; or a page in the specified range is inaccessible or does not exist. SS$_NOPRIV A page in the specified range is in the system address space.
On Alpha and Integrity server systems, unlocks a virtual address range that was previously locked in the working set by the Lock Pages in Working Set ($LKWSET_64) service.This service accepts 64-bit addresses.
SYS$ULWSET_64 start_va_64 ,length_64 ,acmode ,return_va_64 ,return_length_64
int sys$ulwset_64 (void *start_va_64, unsigned __int64 length_64, unsigned int acmode, void *(*(return_va_64)), unsigned __int64 *return_length_64);
start_va_64
OpenVMS usage: address type: quadword address access: read only mechanism: by value
The starting virtual address of the pages to be unlocked from the working set. The specified virtual address will be rounded down to a CPU-specific page boundary.length_64
OpenVMS usage: byte count type: quadword (unsigned) access: read only mechanism: by value
Length of the virtual address space to be unlocked from the working set. The specified length will be rounded up to a CPU-specific page boundary so that it includes all CPU-specific pages in the requested range.acmode
OpenVMS usage: access_mode type: longword (unsigned) access: read only mechanism: by value
Access mode on behalf of which the request is being made. The acmode argument is a longword containing the access mode.The $PSLDEF macro in STARLET.MLB and the file PSLDEF.H in SYS$STARLET_C.TLB define the following symbols and their values for the four access modes:
Value Symbolic Name Access Mode 0 PSL$C_KERNEL Kernel 1 PSL$C_EXEC Executive 2 PSL$C_SUPER Supervisor 3 PSL$C_USER User The most privileged access mode used is the access mode of the caller. To unlock any specified page, the resultant access mode must be equal to or more privileged than the access mode of the owner of that page.
return_va_64
OpenVMS usage: address type: quadword address access: write only mechanism: by 32- or 64-bit reference
The lowest process virtual address of the unlocked virtual address range. The return_va_64 argument is the 32- or 64-bit virtual address of a naturally aligned quadword into which the service returns the virtual address.return_length_64
OpenVMS usage: byte count type: quadword (unsigned) access: write only mechanism: by 32- or 64-bit reference
The length of the virtual address range unlocked. The return_length_64 argument is the 32- or 64-bit virtual address of a naturally aligned quadword into which the service returns the length of the virtual address range in bytes.
The Unlock Pages from Working Set service unlocks pages that were previously locked in the working set by the Lock Pages in Working Set ($LKWSET_64) service. Unlocked pages become candidates for replacement within the working set of the process.If the condition value SS$_ACCVIO is returned by this service, a value cannot be returned in the memory locations pointed to by the return_va_64 and return_length_64 arguments.
If a condition value other than SS$_ACCVIO is returned, the returned address and returned length indicate the pages that were successfully unlocked before the error occurred. If no pages were unlocked, the return_va_64 argument will contain the value -1, and a value cannot be returned in the memory location pointed to by the return_length_64 argument.
On Alpha and Integrity server systems, if the first address specified to SYS$ULWSET_64 is within an image mapped to your process, a success status indicates that the entire image containing the specified address is either unlocked from the working set, or the count of times the image has been locked in the working set has been decremented. This behavior helps to ensure that privileged processes entering kernel mode and raising IPL higher than IPL 2 do not access an invalid page and cause a PGFIPLHI bugcheck. The system keeps a count of the number of times each image within your process has been locked in the working set. This count is maintained so that calls to SYS$ULWSET_64 unlock the image only when it has been called the same number of times as SYS$LKWSET_64.
The LIBRTL routines LIB$LOCK_IMAGE and LIB$UNLOCK_IMAGE are preferable to SYS$LKWSET_64 and SYS$ULWSET_64 for locking and unlocking code and related data in the working set. For more information about locking images in the working set, see the LIBRTL manual and the description of LIB$LOCK_IMAGE and LIB$UNLOCK_IMAGE.
None
None
$LKWSET_64, $PURGE_WS, $ULWSET
SS$_WASCLR The service completed successfully. At least one of the specified pages was previously unlocked. SS$_WASSET The service completed successfully. All of the specified pages were previously locked in the working set. If the image had been locked in the working set, the count of times the image has been locked in the working set has been decremented. Only when the count is zero is the image unlocked from the working set. SS$_ACCVIO The return_va_64 or return_length_64 argument cannot be written by the caller, or an attempt was made to unlock pages by a caller whose access mode is less privileged than the access mode associated with the pages. SS$_PAGNOTINREG A page in the specified range is not within process private address space.
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