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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "evas_cs.h"
#ifdef EVAS_CSERVE
EAPI Mem *
evas_cserve_mem_new(int size, const char *name)
{
Mem *m;
static int id = 0;
char buf[PATH_MAX];
m = calloc(1, sizeof(Mem));
if (!m) return NULL;
if (name)
snprintf(buf, sizeof(buf), "/evas-shm-%x.%s", getuid(), name);
else
{
id++;
snprintf(buf, sizeof(buf), "/evas-shm-%x.%x.%x", getuid(), getpid(), id);
}
m->id = id;
m->offset = 0;
m->name = strdup(buf);
if (!m->name)
{
free(m);
return NULL;
}
m->size = size;
m->fd = shm_open(m->name, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
if (m->fd < 0)
{
free(m->name);
free(m);
return NULL;
}
if (ftruncate(m->fd, m->size) < 0)
{
shm_unlink(m->name);
close(m->fd);
free(m->name);
free(m);
return NULL;
}
eina_mmap_safety_enabled_set(EINA_TRUE);
m->data = mmap(NULL, m->size, PROT_READ | PROT_WRITE, MAP_SHARED, m->fd, 0);
if (m->data == MAP_FAILED)
{
shm_unlink(m->name);
close(m->fd);
free(m->name);
free(m);
return NULL;
}
m->ref = 1;
m->write = 1;
return m;
}
EAPI void
evas_cserve_mem_free(Mem *m)
{
shm_unlink(m->name);
munmap(m->data, m->size);
close(m->fd);
free(m->name);
free(m);
}
EAPI Mem *
evas_cserve_mem_open(int pid, int id, const char *name, int size, int do_write)
{
Mem *m;
char buf[PATH_MAX];
m = calloc(1, sizeof(Mem));
if (!m) return NULL;
if (name)
snprintf(buf, sizeof(buf), "/evas-shm-%x.%s", getuid(), name);
else
snprintf(buf, sizeof(buf), "/evas-shm-%x.%x.%x", getuid(), pid, id);
m->name = strdup(buf);
if (!m->name)
{
free(m);
return NULL;
}
m->size = size;
if (do_write)
m->fd = shm_open(m->name, O_RDWR, S_IRUSR | S_IWUSR);
else
m->fd = shm_open(m->name, O_RDONLY, S_IRUSR);
if (m->fd < 0)
{
free(m->name);
free(m);
return NULL;
}
m->write = do_write;
eina_mmap_safety_enabled_set(EINA_TRUE);
if (do_write)
m->data = mmap(NULL, m->size, PROT_READ | PROT_WRITE, MAP_SHARED, m->fd, 0);
else
m->data = mmap(NULL, m->size, PROT_READ, MAP_SHARED, m->fd, 0);
if (m->data == MAP_FAILED)
{
close(m->fd);
free(m->name);
free(m);
return NULL;
}
m->ref = 1;
return m;
}
EAPI void
evas_cserve_mem_close(Mem *m)
{
munmap(m->data, m->size);
close(m->fd);
free(m->name);
free(m);
}
EAPI Eina_Bool
evas_cserve_mem_resize(Mem *m, int size)
{
if (m->size == size) return 1;
if (m->write)
{
if (ftruncate(m->fd, size) < 0) return 0;
munmap(m->data, m->size);
eina_mmap_safety_enabled_set(EINA_TRUE);
m->data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, m->fd, 0);
}
else
{
munmap(m->data, m->size);
eina_mmap_safety_enabled_set(EINA_TRUE);
m->data = mmap(NULL, size, PROT_READ, MAP_SHARED, m->fd, 0);
}
if (m->data == MAP_FAILED)
{
m->data = NULL;
return 0;
}
m->size = size;
return 1;
}
EAPI void
evas_cserve_mem_del(int pid, int id)
{
char buf[PATH_MAX];
snprintf(buf, sizeof(buf), "/evas-shm-%x.%x.%x", getuid(), pid, id);
shm_unlink(buf);
}
#endif
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