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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>
#include "evas_cserve2.h"
static Eina_Bool
command_read(int fd, Slave_Command *cmd, void **params)
{
ssize_t ret;
int ints[2], size, got = 0;
char *buf;
ret = read(fd, ints, sizeof(int) * 2);
if (ret < (int)sizeof(int) * 2)
return EINA_FALSE;
size = ints[0];
buf = malloc(size);
if (!buf) return EINA_FALSE;
do {
ret = read(fd, buf + got, size - got);
if (ret < 0)
{
/* EINTR means we were interrupted by a signal before anything
* was sent, and if we are back here it means that signal was
* not meant for us to die. Any other error here is fatal and
* should result in the slave terminating.
*/
if (errno == EINTR)
continue;
free(buf);
return EINA_FALSE;
}
got += ret;
} while (got < size);
*cmd = ints[1];
*params = buf;
return EINA_TRUE;
}
static Eina_Bool
response_send(int fd, Slave_Command cmd, void *resp, int size)
{
int sent = 0, ints[2];
const char *data = resp;
ssize_t ret;
ints[0] = size;
ints[1] = cmd;
ret = write(fd, ints, sizeof(int) * 2);
if (ret < 0)
return EINA_FALSE;
if (!size)
return EINA_TRUE;
do {
ret = write(fd, data + sent, size - sent);
if (ret < 0)
{
/* EINTR means we were interrupted by a signal before anything
* was sent, and if we are back here it means that signal was
* not meant for us to die. Any other error here is fatal and
* should result in the slave terminating.
*/
if (errno == EINTR)
continue;
return EINA_FALSE;
}
sent += ret;
} while (sent < size);
return EINA_TRUE;
}
static Eina_Bool
error_send(int fd, Error_Type err)
{
return response_send(fd, ERROR, &err, sizeof(Error_Type));
}
static void *
_cserve2_shm_map(const char *name, size_t length, off_t offset)
{
void *map;
int fd;
fd = shm_open(name, O_RDWR, 0);
if (fd == -1)
return MAP_FAILED;
map = mmap(NULL, length, PROT_WRITE, MAP_SHARED, fd, offset);
close(fd);
return map;
}
/*
static void
_cserve2_shm_unmap(void *map, size_t length)
{
munmap(map, length);
}
*/
static Error_Type
image_open(const char *file EINA_UNUSED, const char *key EINA_UNUSED, Slave_Msg_Image_Opened *result)
{
memset(result, 0, sizeof(*result));
result->w = 32;
result->h = 32;
result->frame_count = 1;
result->loop_count = 0;
result->loop_hint = 0;
result->alpha = EINA_TRUE;
return CSERVE2_NONE;
}
static Error_Type
image_load(const char *shmfile, Slave_Msg_Image_Load *params)
{
char *map = _cserve2_shm_map(shmfile, params->shm.mmap_size,
params->shm.mmap_offset);
if (map == MAP_FAILED)
return CSERVE2_RESOURCE_ALLOCATION_FAILED;
memset(map + params->shm.image_offset, 'A', params->shm.image_size);
return CSERVE2_NONE;
}
int main(int c, char **v)
{
int wfd, rfd;
Slave_Command cmd;
void *params = NULL;;
Eina_Bool quit = EINA_FALSE;
if (c < 3)
return 1;
wfd = atoi(v[1]);
rfd = atoi(v[2]);
while (!quit)
{
if (!command_read(rfd, &cmd, &params))
{
error_send(wfd, CSERVE2_INVALID_COMMAND);
continue;
}
switch (cmd)
{
case IMAGE_OPEN:
{
Slave_Msg_Image_Opened result;
Slave_Msg_Image_Open *p;
Error_Type err;
const char *file, *key;
p = params;
file = (const char *)(p + sizeof(*p));
key = file + strlen(file) + 1;
if ((err = image_open(file, key, &result)) != CSERVE2_NONE)
error_send(wfd, err);
else
response_send(wfd, IMAGE_OPEN, &result,
sizeof(Slave_Msg_Image_Opened));
break;
}
case IMAGE_LOAD:
{
Slave_Msg_Image_Load *load_args = params;
Error_Type err;
const char *shmfile = ((const char *)params) +
sizeof(Slave_Msg_Image_Load);
if ((err = image_load(shmfile, load_args)) != CSERVE2_NONE)
error_send(wfd, err);
else
response_send(wfd, IMAGE_LOAD, NULL, 0);
break;
}
case SLAVE_QUIT:
{
quit = EINA_TRUE;
break;
}
default:
error_send(wfd, CSERVE2_INVALID_COMMAND);
}
free(params);
}
return 0;
}