/usr/share/gnu-smalltalk/kernel/Memory.st is in gnu-smalltalk-common 3.2.4-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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|
| Memory definitions
|
|
======================================================================"
"======================================================================
|
| Copyright 1988,92,94,95,99,2000,2001,2003
| Free Software Foundation, Inc.
| Written by Steve Byrne.
|
| This file is part of the GNU Smalltalk class library.
|
| The GNU Smalltalk class library is free software; you can redistribute it
| and/or modify it under the terms of the GNU Lesser General Public License
| as published by the Free Software Foundation; either version 2.1, or (at
| your option) any later version.
|
| The GNU Smalltalk class library is distributed in the hope that it will be
| useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
| General Public License for more details.
|
| You should have received a copy of the GNU Lesser General Public License
| along with the GNU Smalltalk class library; see the file COPYING.LIB.
| If not, write to the Free Software Foundation, 59 Temple Place - Suite
| 330, Boston, MA 02110-1301, USA.
|
======================================================================"
Object subclass: Memory [
<category: 'Language-Implementation'>
<comment: 'I provide access to actual machine addresses of OOPs and objects. I
have no instances; you send messages to my class to map between an object
and the address of its OOP or object. In addition I provide direct
memory access with different C types (ints, chars, OOPs, floats,...).'>
Memory class >> at: anAddress [
"Access the Smalltalk object (OOP) at the given address."
<category: 'accessing'>
^self type: 9 at: anAddress
]
Memory class >> bigEndian [
"Answer whether we're running on a big- or little-endian system."
<category: 'accessing'>
^Bigendian
]
Memory class >> charAt: anAddress [
"Access the C char at the given address. The value is
returned as a Smalltalk Character."
<category: 'accessing'>
^self type: 0 at: anAddress
]
Memory class >> unsignedCharAt: anAddress [
"Access the C unsigned char at the given address.
The value is returned as a Smalltalk Character."
<category: 'accessing'>
^self type: 1 at: anAddress
]
Memory class >> shortAt: anAddress [
"Access the C short int at the given address."
<category: 'accessing'>
^self type: 2 at: anAddress
]
Memory class >> unsignedShortAt: anAddress [
"Access the C unsigned short int at the given address."
<category: 'accessing'>
^self type: 3 at: anAddress
]
Memory class >> longAt: anAddress [
"Access the C long int at the given address."
<category: 'accessing'>
^self type: 4 at: anAddress
]
Memory class >> unsignedLongAt: anAddress [
"Access the C unsigned long int at the given address."
<category: 'accessing'>
^self type: 5 at: anAddress
]
Memory class >> intAt: anAddress [
"Access the C int at the given address."
<category: 'accessing'>
^self type: 10 at: anAddress
]
Memory class >> unsignedIntAt: anAddress [
"Access the C unsigned int at the given address."
<category: 'accessing'>
^self type: 11 at: anAddress
]
Memory class >> floatAt: anAddress [
"Access the C float at the given address."
<category: 'accessing'>
^self type: 6 at: anAddress
]
Memory class >> doubleAt: anAddress [
"Access the C double at the given address."
<category: 'accessing'>
^self type: 7 at: anAddress
]
Memory class >> longDoubleAt: anAddress [
"Access the C long double at the given address."
<category: 'accessing'>
^self type: 12 at: anAddress
]
Memory class >> stringAt: anAddress [
"Access the string pointed by the C `char *' at the given given address."
<category: 'accessing'>
^self type: 8 at: anAddress
]
Memory class >> deref: anAddress [
"Access the C int pointed by the given address"
<category: 'accessing'>
^self intAt: anAddress
]
Memory class >> at: anAddress put: aValue [
"Store a pointer (OOP) to the Smalltalk object identified by `value'
at the given address."
<category: 'accessing'>
^self
type: 9
at: anAddress
put: aValue
]
Memory class >> intAt: anAddress put: aValue [
"Store the Smalltalk Integer object identified by `value', at the
given address, using sizeof(int) bytes."
<category: 'accessing'>
^self
type: 10
at: anAddress
put: aValue
]
Memory class >> unsignedIntAt: anAddress put: aValue [
"Store the Smalltalk Integer object identified by `value', at the
given address, using sizeof(int) bytes."
<category: 'accessing'>
^self
type: 11
at: anAddress
put: aValue
]
Memory class >> uintAt: anAddress put: aValue [
"Store the Smalltalk Integer object identified by `value', at the
given address, using sizeof(int) bytes."
<category: 'accessing'>
^self
type: 11
at: anAddress
put: aValue
]
Memory class >> charAt: anAddress put: aValue [
"Store as a C char the Smalltalk Character or Integer object
identified by `value', at the given address, using sizeof(char)
bytes - i.e. 1 byte."
<category: 'accessing'>
^self
type: 0
at: anAddress
put: aValue
]
Memory class >> unsignedCharAt: anAddress put: aValue [
"Store as a C char the Smalltalk Character or Integer object
identified by `value', at the given address, using sizeof(char)
bytes - i.e. 1 byte."
<category: 'accessing'>
^self
type: 1
at: anAddress
put: aValue
]
Memory class >> ucharAt: anAddress put: aValue [
"Store as a C char the Smalltalk Character or Integer object
identified by `value', at the given address, using sizeof(char)
bytes - i.e. 1 byte."
<category: 'accessing'>
^self
type: 1
at: anAddress
put: aValue
]
Memory class >> shortAt: anAddress put: aValue [
"Store the Smalltalk Integer object identified by `value', at the
given address, using sizeof(short) bytes."
<category: 'accessing'>
^self
type: 2
at: anAddress
put: aValue
]
Memory class >> unsignedShortAt: anAddress put: aValue [
"Store the Smalltalk Integer object identified by `value', at the
given address, using sizeof(short) bytes."
<category: 'accessing'>
^self
type: 3
at: anAddress
put: aValue
]
Memory class >> ushortAt: anAddress put: aValue [
"Store the Smalltalk Integer object identified by `value', at the
given address, using sizeof(short) bytes."
<category: 'accessing'>
^self
type: 3
at: anAddress
put: aValue
]
Memory class >> longAt: anAddress put: aValue [
"Store the Smalltalk Integer object identified by `value', at the
given address, using sizeof(long) bytes."
<category: 'accessing'>
^self
type: 4
at: anAddress
put: aValue
]
Memory class >> unsignedLongAt: anAddress put: aValue [
"Store the Smalltalk Integer object identified by `value', at the
given address, using sizeof(long) bytes."
<category: 'accessing'>
^self
type: 5
at: anAddress
put: aValue
]
Memory class >> ulongAt: anAddress put: aValue [
"Store the Smalltalk Integer object identified by `value', at the
given address, using sizeof(long) bytes."
<category: 'accessing'>
^self
type: 5
at: anAddress
put: aValue
]
Memory class >> floatAt: anAddress put: aValue [
"Store the Smalltalk Float object identified by `value', at the
given address, writing it like a C float."
<category: 'accessing'>
^self
type: 6
at: anAddress
put: aValue
]
Memory class >> doubleAt: anAddress put: aValue [
"Store the Smalltalk Float object identified by `value', at the
given address, writing it like a C double."
<category: 'accessing'>
^self
type: 7
at: anAddress
put: aValue
]
Memory class >> longDoubleAt: anAddress put: aValue [
"Store the Smalltalk Float object identified by `value', at the
given address, writing it like a C long double."
<category: 'accessing'>
^self
type: 12
at: anAddress
put: aValue
]
Memory class >> stringAt: anAddress put: aValue [
"Store the Smalltalk String object identified by `value', at the
given address in memory, writing it like a *FRESHLY ALLOCATED*
C string. It is the caller's responsibility to free it if
necessary."
<category: 'accessing'>
^self
type: 8
at: anAddress
put: aValue
]
Memory class >> type: aType at: anAddress [
"Returns a particular type object from memory at anAddress"
<category: 'private'>
<primitive: VMpr_Memory_at>
^self primitiveFailed
]
Memory class >> type: aType at: anAddress put: aValue [
"Sets the memory location anAddress to aValue"
<category: 'private'>
<primitive: VMpr_Memory_atPut>
^self primitiveFailed
]
]
|