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AIX Version 4.3 General Programming Concepts: Writing and Debugging Programs

List of Memory Manipulation Services

The memory functions operate on arrays of characters in memory called memory areas. These subroutines enable you to:

You do not need to specify any special flag to the compiler in order to use the memory functions. However, you must include the header file for these functions in your program. To include the header file, use the following statement:

#include <memory.h>

The following memory services are provided:

compare_and_swap
Compares and swaps data.
fetch_and_add
Updates a single word variable atomically.
fetch_and_and or fetch_and_or
Sets or clears bits in a single word variable atomically.
malloc, free, realloc, calloc, mallopt, mallinfo, or alloca
Allocate memory.
memccpy, memchr, memcmp, memcpy, memset or memmove
Performs memory operations.
moncontrol
Starts and stops execution profiling after initialization by the monitor subroutine.
monitor
Starts and stops execution profiling using data areas defined in the function parameters.
monstartup
Starts and stops execution profiling using default-sized data areas.
msem_init
Initializes a semaphore in a mapped file or shared memory region.
msem_lock
Locks a semaphore.
msem_remove
Removes a semaphore.
msem_unlock
Unlocks a semaphore.
msleep
Puts a process to sleep when a semaphore is busy.
mwakeup
Wakes up a process that is waiting on a semaphore.
disclaim
Disclaims the content of a memory address range.
ftok
Generates a standard interprocess communication key.
getpagesize
Gets the system page size.
psdanger
Defines the amount of free paging space available.
shmat
Attaches a shared memory segment or a mapped file to the current process.
shmctl
Controls shared memory operations.
shmdt
Detaches a shared memory segment.
shmget
Gets a shared memory segment.
swapon
Activates paging or swapping to a designated block device.
swapqry
Returns device status.

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