312 lines
7.4 KiB
C
312 lines
7.4 KiB
C
/* PIKA - Photo and Image Kooker Application
|
|
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
|
|
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
|
|
*
|
|
* Original copyright, applying to most contents (license remains unchanged):
|
|
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
|
|
*
|
|
* pikapluginhsm.c
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <errno.h>
|
|
|
|
#if defined(USE_SYSV_SHM)
|
|
|
|
#ifdef HAVE_IPC_H
|
|
#include <sys/ipc.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_SHM_H
|
|
#include <sys/shm.h>
|
|
#endif
|
|
|
|
#elif defined(USE_POSIX_SHM)
|
|
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#include <fcntl.h>
|
|
#include <sys/mman.h>
|
|
|
|
#endif /* USE_POSIX_SHM */
|
|
|
|
#include <gio/gio.h>
|
|
#include <gegl.h>
|
|
|
|
#if defined(G_OS_WIN32) || defined(G_WITH_CYGWIN)
|
|
|
|
#define STRICT
|
|
#include <windows.h>
|
|
#include <process.h>
|
|
|
|
#ifdef G_OS_WIN32
|
|
#include <fcntl.h>
|
|
#include <io.h>
|
|
#endif
|
|
|
|
#define USE_WIN32_SHM 1
|
|
|
|
#endif /* G_OS_WIN32 || G_WITH_CYGWIN */
|
|
|
|
#include "plug-in-types.h"
|
|
|
|
#include "core/pika-utils.h"
|
|
|
|
#include "pikapluginshm.h"
|
|
|
|
#include "pika-log.h"
|
|
|
|
|
|
#define TILE_MAP_SIZE (PIKA_PLUG_IN_TILE_WIDTH * PIKA_PLUG_IN_TILE_HEIGHT * 32)
|
|
|
|
#define ERRMSG_SHM_DISABLE "Disabling shared memory tile transport"
|
|
|
|
|
|
struct _PikaPlugInShm
|
|
{
|
|
gint shm_id;
|
|
guchar *shm_addr;
|
|
|
|
#if defined(USE_WIN32_SHM)
|
|
HANDLE shm_handle;
|
|
#endif
|
|
};
|
|
|
|
|
|
PikaPlugInShm *
|
|
pika_plug_in_shm_new (void)
|
|
{
|
|
/* allocate a piece of shared memory for use in transporting tiles
|
|
* to plug-ins. if we can't allocate a piece of shared memory then
|
|
* we'll fall back on sending the data over the pipe.
|
|
*/
|
|
|
|
PikaPlugInShm *shm = g_slice_new0 (PikaPlugInShm);
|
|
|
|
shm->shm_id = -1;
|
|
|
|
#if defined(USE_SYSV_SHM)
|
|
|
|
/* Use SysV shared memory mechanisms for transferring tile data. */
|
|
{
|
|
shm->shm_id = shmget (IPC_PRIVATE, TILE_MAP_SIZE, IPC_CREAT | 0600);
|
|
|
|
if (shm->shm_id != -1)
|
|
{
|
|
shm->shm_addr = (guchar *) shmat (shm->shm_id, NULL, 0);
|
|
|
|
if (shm->shm_addr == (guchar *) -1)
|
|
{
|
|
g_printerr ("shmat() failed: %s\n" ERRMSG_SHM_DISABLE,
|
|
g_strerror (errno));
|
|
shmctl (shm->shm_id, IPC_RMID, NULL);
|
|
shm->shm_id = -1;
|
|
}
|
|
|
|
#ifdef IPC_RMID_DEFERRED_RELEASE
|
|
if (shm->shm_addr != (guchar *) -1)
|
|
shmctl (shm->shm_id, IPC_RMID, NULL);
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
g_printerr ("shmget() failed: %s\n" ERRMSG_SHM_DISABLE,
|
|
g_strerror (errno));
|
|
}
|
|
}
|
|
|
|
#elif defined(USE_WIN32_SHM)
|
|
|
|
/* Use Win32 shared memory mechanisms for transferring tile data. */
|
|
{
|
|
gint pid;
|
|
gchar fileMapName[MAX_PATH];
|
|
wchar_t *w_fileMapName = NULL;
|
|
|
|
/* Our shared memory id will be our process ID */
|
|
pid = GetCurrentProcessId ();
|
|
|
|
/* From the id, derive the file map name */
|
|
g_snprintf (fileMapName, sizeof (fileMapName), "PIKA%d.SHM", pid);
|
|
|
|
w_fileMapName = g_utf8_to_utf16 (fileMapName, -1, NULL, NULL, NULL);
|
|
|
|
/* Create the file mapping into paging space */
|
|
shm->shm_handle = CreateFileMappingW (INVALID_HANDLE_VALUE, NULL,
|
|
PAGE_READWRITE, 0,
|
|
TILE_MAP_SIZE,
|
|
w_fileMapName);
|
|
|
|
g_free (w_fileMapName);
|
|
w_fileMapName = NULL;
|
|
|
|
if (shm->shm_handle)
|
|
{
|
|
/* Map the shared memory into our address space for use */
|
|
shm->shm_addr = (guchar *) MapViewOfFile (shm->shm_handle,
|
|
FILE_MAP_ALL_ACCESS,
|
|
0, 0, TILE_MAP_SIZE);
|
|
|
|
/* Verify that we mapped our view */
|
|
if (shm->shm_addr)
|
|
{
|
|
shm->shm_id = pid;
|
|
}
|
|
else
|
|
{
|
|
g_printerr ("MapViewOfFile error: %u... " ERRMSG_SHM_DISABLE,
|
|
(unsigned) GetLastError ());
|
|
}
|
|
}
|
|
else
|
|
{
|
|
g_printerr ("CreateFileMapping error: %u... " ERRMSG_SHM_DISABLE,
|
|
(unsigned) GetLastError ());
|
|
}
|
|
}
|
|
|
|
#elif defined(USE_POSIX_SHM)
|
|
|
|
/* Use POSIX shared memory mechanisms for transferring tile data. */
|
|
{
|
|
gint pid;
|
|
gchar shm_handle[32];
|
|
gint shm_fd;
|
|
|
|
/* Our shared memory id will be our process ID */
|
|
pid = pika_get_pid ();
|
|
|
|
/* From the id, derive the file map name */
|
|
g_snprintf (shm_handle, sizeof (shm_handle), "/pika-shm-%d", pid);
|
|
|
|
/* Create the file mapping into paging space */
|
|
shm_fd = shm_open (shm_handle, O_RDWR | O_CREAT, 0600);
|
|
|
|
if (shm_fd != -1)
|
|
{
|
|
if (ftruncate (shm_fd, TILE_MAP_SIZE) != -1)
|
|
{
|
|
/* Map the shared memory into our address space for use */
|
|
shm->shm_addr = (guchar *) mmap (NULL, TILE_MAP_SIZE,
|
|
PROT_READ | PROT_WRITE, MAP_SHARED,
|
|
shm_fd, 0);
|
|
|
|
/* Verify that we mapped our view */
|
|
if (shm->shm_addr != MAP_FAILED)
|
|
{
|
|
shm->shm_id = pid;
|
|
}
|
|
else
|
|
{
|
|
g_printerr ("mmap() failed: %s\n" ERRMSG_SHM_DISABLE,
|
|
g_strerror (errno));
|
|
|
|
shm_unlink (shm_handle);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
g_printerr ("ftruncate() failed: %s\n" ERRMSG_SHM_DISABLE,
|
|
g_strerror (errno));
|
|
|
|
shm_unlink (shm_handle);
|
|
}
|
|
|
|
close (shm_fd);
|
|
}
|
|
else
|
|
{
|
|
g_printerr ("shm_open() failed: %s\n" ERRMSG_SHM_DISABLE,
|
|
g_strerror (errno));
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
if (shm->shm_id == -1)
|
|
{
|
|
g_slice_free (PikaPlugInShm, shm);
|
|
shm = NULL;
|
|
}
|
|
else
|
|
{
|
|
PIKA_LOG (SHM, "attached shared memory segment ID = %d", shm->shm_id);
|
|
}
|
|
|
|
return shm;
|
|
}
|
|
|
|
void
|
|
pika_plug_in_shm_free (PikaPlugInShm *shm)
|
|
{
|
|
g_return_if_fail (shm != NULL);
|
|
|
|
if (shm->shm_id != -1)
|
|
{
|
|
|
|
#if defined (USE_SYSV_SHM)
|
|
|
|
shmdt (shm->shm_addr);
|
|
|
|
#ifndef IPC_RMID_DEFERRED_RELEASE
|
|
shmctl (shm->shm_id, IPC_RMID, NULL);
|
|
#endif
|
|
|
|
#elif defined(USE_WIN32_SHM)
|
|
|
|
if (shm->shm_handle)
|
|
CloseHandle (shm->shm_handle);
|
|
|
|
#elif defined(USE_POSIX_SHM)
|
|
|
|
gchar shm_handle[32];
|
|
|
|
munmap (shm->shm_addr, TILE_MAP_SIZE);
|
|
|
|
g_snprintf (shm_handle, sizeof (shm_handle), "/pika-shm-%d",
|
|
shm->shm_id);
|
|
|
|
shm_unlink (shm_handle);
|
|
|
|
#endif
|
|
|
|
PIKA_LOG (SHM, "detached shared memory segment ID = %d", shm->shm_id);
|
|
}
|
|
|
|
g_slice_free (PikaPlugInShm, shm);
|
|
}
|
|
|
|
gint
|
|
pika_plug_in_shm_get_id (PikaPlugInShm *shm)
|
|
{
|
|
g_return_val_if_fail (shm != NULL, -1);
|
|
|
|
return shm->shm_id;
|
|
}
|
|
|
|
guchar *
|
|
pika_plug_in_shm_get_addr (PikaPlugInShm *shm)
|
|
{
|
|
g_return_val_if_fail (shm != NULL, NULL);
|
|
|
|
return shm->shm_addr;
|
|
}
|
