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A shared space multi-threaded example application presenting the use of the

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thread library. It also exemplifies how a new sample application can be added.
This commit is contained in:
Bora Sahin
2009-11-17 21:48:46 +02:00
parent 9a8e1fa437
commit 496fba81c8
4 changed files with 207 additions and 1 deletions
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116
conts/examples/example2/main.c Normal file
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/*
* Main function for this container
*/
#include <l4lib/arch/syslib.h>
#include <l4lib/arch/syscalls.h>
#include <l4/api/space.h>
#include <l4thread/thread.h>
/* Symbolic constants */
#define STACK_SIZE 0x1000
#define NTHREADS 10
/* Stack and utcb region */
static char stack[NTHREADS * STACK_SIZE];
DECLARE_UTCB_SPACE(utcb, NTHREADS)
/* Function definitions */
static void init_thread_lib(void)
{
/* Thread lib is informed about the stack region. */
l4_set_stack_params((unsigned long)stack,
(unsigned long)(stack + sizeof(stack)),
STACK_SIZE);
/* Thread lib is informed about the utcb region. */
l4_set_utcb_params((unsigned long)utcb,
(unsigned long)(utcb + sizeof(utcb)));
/* Now, we are ready to make calls to the library. */
}
static int do_some_work1(void *arg)
{
struct task_ids ids;
int value = *(int *)arg;
int j;
l4_getid(&ids);
printf("tid = %d is called with the value of (%d).\n",
__raw_tid(ids.tid), value);
/* Wait for a while before exiting */
j = 0x400000;
while (--j)
;
return ids.tid;
}
static int do_some_work2(void *arg)
{
struct task_ids ids;
int value = *(int *)arg;
int j;
l4_getid(&ids);
printf("tid = %d is called with the value of (%d).\n",
__raw_tid(ids.tid), value);
/* Wait for a while before exiting */
j = 0x400000;
while (--j)
;
l4_thread_exit(ids.tid);
/* Should never reach here */
return 0;
}
static int thread_demo(void)
{
struct task_ids ids[NTHREADS];
int arg[NTHREADS];
int j;
memset(ids, 0, sizeof(ids));
/* Create threads. */
for (int i = 0; i < NTHREADS; ++i) {
/* The argument passed to the thread in question. */
arg[i] = i;
/* Threads are created. */
if (i % 2)
l4_thread_create(&ids[i], TC_SHARE_SPACE | TC_SHARE_PAGER,
do_some_work1, (void *)&arg[i]);
else
l4_thread_create(&ids[i], TC_SHARE_SPACE | TC_SHARE_PAGER,
do_some_work2, (void *)&arg[i]);
/* Wait for a while before launching another thread. */
j = 0x100000;
while (--j)
;
}
/* Wait for them to exit. */
for (int i = 0; i < NTHREADS; ++i)
printf("tid = %d exited with (%d).\n", __raw_tid(ids[i].tid),
l4_thread_control(THREAD_WAIT, &ids[i]));
return 0;
}
int main(void)
{
/* Before using the thread lib, we have to initialize it. */
init_thread_lib();
/* Demonstrates the usage of the thread lib. */
thread_demo();
return 0;
}