mem.c File Reference

#include <stdio.h>
#include <os_config.h>
#include <config/config_cparam.h>
#include <config/config_param.h>
#include <sys/arch.h>
#include <sys/process.h>
#include <sys/mem.h>
#include <sys/init.h>
#include <sys/shm.h>
#include <sys/kmsg.h>
#include <sys/kpthread.h>
#include <sys/ksched.h>
#include <sys/decls.h>
#include <sys/bufmalloc.h>
#include <errno.h>

Functions
void	alloc_pidq_mem (queuep queue, unsigned int qtype, unsigned int qno)
Variables
pid_t	pid_queue_mem [PID_QUEUE_MSIZE]

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Detailed Description

This contains the Memory allocation routines.

• All the memory initialization routines for various system modules is defined here. The memory for all the modules are allocated statically, the size of which can be configured by the user. This can be specified in structures defined in sys/init.c. Based on this the total memory requirements for each module is calculated.
• This also contains routines that allocate thread context and buffer management.

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Function Documentation

void alloc_pidq_mem (  queuep  queue, unsigned int  qtype, unsigned int  qno )

Allocate memory to the process ID queue's. This includes the Ready_Q and Semaphore_Q. Initial memory is allocated for Ready queue, followed by the semaphore queue. Parameters: queue  is the queue of PIDs qtype is the queue type. Can be READY_Q or SEMA_Q qno is the Queue number. (eg) There are N_PRIO number of Ready Queue. The qno denotes this number. Memory for queues is allocated sequentially. Returns: None Note: SEMA_Q is valid only if CONFIG_SEMA is defined.

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Variable Documentation

pid_t pid_queue_mem[PID_QUEUE_MSIZE]

Memory allocated for storing Process IDs. This memory is used for Ready Queue and Semaphore Queue. The memory is split as follows: Memory for Ready Queue's. Memory for Semaphore Queue's.

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