--- /dev/null
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GST_ATOMIC_H__
+#define __GST_ATOMIC_H__
+
+/* FIXME */
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#ifdef HAVE_ATOMIC_H
+# include <asm/atomic.h>
+#endif
+
+#include <glib.h>
+
+G_BEGIN_DECLS
+
+typedef struct _GstAtomicInt GstAtomicInt;
+
+struct _GstAtomicInt {
+#ifdef HAVE_ATOMIC_H
+ atomic_t value;
+#else
+ int value;
+ GMutex *lock;
+#endif
+};
+
+#ifdef HAVE_ATOMIC_H
+
+/* atomic functions */
+#define GST_ATOMIC_INT_INIT(ref, val) (atomic_set(&((ref)->value), (val)))
+#define GST_ATOMIC_INT_FREE(ref)
+
+#define GST_ATOMIC_INT_SET(ref,val) (atomic_set(&((ref)->value), (val)))
+#define GST_ATOMIC_INT_VALUE(ref) (atomic_read(&((ref)->value)))
+#define GST_ATOMIC_INT_READ(ref,res) (*res = atomic_read(&((ref)->value)))
+#define GST_ATOMIC_INT_INC(ref) (atomic_inc (&((ref)->value)))
+#define GST_ATOMIC_INT_DEC_AND_TEST(ref,zero) (*zero = atomic_dec_and_test (&((ref)->value)))
+#define GST_ATOMIC_INT_ADD(ref, count) (atomic_add ((count), &((ref)->value)))
+
+#else
+
+/* fallback using a lock */
+#define GST_ATOMIC_INT_INIT(ref, val) \
+G_STMT_START { \
+ (ref)->value = (val); \
+ (ref)->lock = g_mutex_new(); \
+} G_STMT_END
+
+#define GST_ATOMIC_INT_FREE(ref) g_mutex_free (&(ref)->lock)
+
+#define GST_ATOMIC_INT_SET(ref,val) \
+G_STMT_START { \
+ g_mutex_lock ((ref)->lock); \
+ (ref)->value = (val); \
+ g_mutex_unlock ((ref)->lock); \
+} G_STMT_END
+
+#define GST_ATOMIC_INT_VALUE(ref) ((ref)->value)
+#define GST_ATOMIC_INT_READ(ref,res) \
+G_STMT_START { \
+ g_mutex_lock ((ref)->lock); \
+ *res = (ref)->value; \
+ g_mutex_unlock ((ref)->lock); \
+} G_STMT_END
+
+#define GST_ATOMIC_INT_INC(ref) \
+G_STMT_START { \
+ g_mutex_lock ((ref)->lock); \
+ (ref)->value++; \
+ g_mutex_unlock ((ref)->lock); \
+} G_STMT_END
+
+#define GST_ATOMIC_INT_DEC_AND_TEST(ref,zero) \
+G_STMT_START { \
+ g_mutex_lock ((ref)->lock); \
+ (ref)->value--; \
+ *zero = ((ref)->value == 0); \
+ g_mutex_unlock ((ref)->lock); \
+} G_STMT_END
+
+#define GST_ATOMIC_INT_ADD(ref, count) \
+G_STMT_START { \
+ g_mutex_lock ((ref)->lock); \
+ (ref)->value += count; \
+ g_mutex_unlock ((ref)->lock); \
+} G_STMT_END
+
+#endif /* HAVE_ATOMIC_H */
+
+typedef struct _GstAtomicSwap GstAtomicSwap;
+
+#define GST_ATOMIC_SWAP_VALUE(swap) ((swap)->value)
+
+struct _GstAtomicSwap {
+ volatile gpointer value;
+ volatile gulong cnt; /* for the ABA problem */
+ GMutex *lock; /* lock for C fallback */
+};
+
+#if defined (__i386__) && defined (__GNUC__) && __GNUC__ >= 2
+
+# ifdef __SMP__
+# define GST_ATOMIC_LOCK "lock ; "
+# else
+# define GST_ATOMIC_LOCK ""
+# endif
+
+#define _GST_ATOMIC_SWAP_INIT(swap,val) \
+G_STMT_START { \
+ (swap)->value = (gpointer)(val); \
+ (swap)->cnt = 0; \
+} G_STMT_END
+
+#define _GST_ATOMIC_SWAP(swap, val) \
+G_STMT_START { \
+ __asm__ __volatile__ ("1:" \
+ " movl %2, (%1);" \
+ GST_ATOMIC_LOCK "cmpxchg %1, %0;" \
+ " jnz 1b;" \
+ : \
+ : "m" (*swap), \
+ "r" (val), \
+ "a" ((swap)->value)); \
+} G_STMT_END
+
+#define _GST_ATOMIC_SWAP_GET(swap, val, res) \
+G_STMT_START { \
+ __asm__ __volatile__ (" testl %%eax, %%eax;" \
+ " jz 20f;" \
+ "10:" \
+ " movl (%%eax), %%ebx;" \
+ " movl %%edx, %%ecx;" \
+ " incl %%ecx;" \
+ GST_ATOMIC_LOCK "cmpxchg8b %1;" \
+ " jz 20f;" \
+ " testl %%eax, %%eax;" \
+ " jnz 10b;" \
+ "20:\t" \
+ : "=a" (*res) \
+ : "m" (*(swap)), \
+ "a" (val), \
+ "d" ((swap)->cnt) \
+ : "ecx", "ebx"); \
+} G_STMT_END
+
+#else
+
+#define _GST_ATOMIC_SWAP_INIT(swap,val) \
+G_STMT_START { \
+ (swap)->lock = g_mutex_new(); \
+ (swap)->value = (gpointer)val; \
+} G_STMT_END
+
+#define _GST_ATOMIC_SWAP(swap, val) \
+G_STMT_START { \
+ gpointer tmp; \
+ g_mutex_lock ((swap)->lock); \
+ tmp = (swap)->value; \
+ (swap)->value = val; \
+ ((gpointer)*val) = tmp; \
+ g_mutex_unlock ((swap)->lock); \
+} G_STMT_END
+
+#define _GST_ATOMIC_SWAP_GET(swap, val, res) \
+G_STMT_START { \
+ if (val) { \
+ gpointer tmp; \
+ gint *tmp2; /* this is pretty EVIL */ \
+ g_mutex_lock ((swap)->lock); \
+ tmp = (swap)->value; \
+ tmp2 = val; \
+ (swap)->value = (gpointer)*tmp2; \
+ (*res) = (gpointer)*tmp2 = tmp; \
+ g_mutex_unlock ((swap)->lock); \
+ } \
+} G_STMT_END
+#endif
+
+/* initialize the swap structure with an initial value */
+#define GST_ATOMIC_SWAP_INIT(swap,val) _GST_ATOMIC_SWAP_INIT(swap, val)
+
+/* atomically swap the contents the swap value with the value pointed to
+ * by val. */
+#define GST_ATOMIC_SWAP(swap, val) _GST_ATOMIC_SWAP(swap, val)
+
+/* atomically swap the contents the swap value with the value pointed to
+ * by val. The new value of the swap value is returned in the memory pointed
+ * to by res */
+#define GST_ATOMIC_SWAP_GET(swap,val,res) _GST_ATOMIC_SWAP_GET(swap, val, res)
+
+G_END_DECLS
+
+#endif /* __GST_ATOMIC_H__ */
--- /dev/null
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ * 2000 Wim Taymans <wtay@chello.be>
+ *
+ * gstdata.c: Data operations
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/* this file makes too much noise for most debugging sessions */
+#define GST_DEBUG_FORCE_DISABLE
+#include "gst_private.h"
+
+#include "gstdata.h"
+#include "gstdata_private.h"
+#include "gstlog.h"
+
+void
+_gst_data_init (GstData *data, GType type, guint16 flags, GstDataFreeFunction free, GstDataCopyFunction copy)
+{
+ _GST_DATA_INIT (data, type, flags, free, copy);
+}
+
+void
+_gst_data_free (GstData *data)
+{
+ _GST_DATA_DISPOSE (data);
+ g_free (data);
+}
+
+/**
+ * gst_data_copy:
+ * @data: a #GstData to copy
+ *
+ * Copies the given #GstData
+ *
+ * Returns: a copy of the data or NULL if the data cannot be copied.
+ */
+GstData*
+gst_data_copy (const GstData *data)
+{
+ if (data->copy)
+ return data->copy (data);
+
+ return NULL;
+}
+
+/**
+ * gst_data_copy_on_write:
+ * @data: a #GstData to copy
+ *
+ * Copies the given #GstData if the refcount is greater than 1 so that the
+ * #GstData object can be written to safely.
+ *
+ * Returns: a copy of the data if the refcount is > 1, data if the refcount == 1
+ * or NULL if the data could not be copied.
+ */
+GstData*
+gst_data_copy_on_write (const GstData *data)
+{
+ gint refcount;
+
+ GST_ATOMIC_INT_READ (&data->refcount, &refcount);
+
+ if (refcount == 1)
+ return GST_DATA (data);
+
+ if (data->copy)
+ return data->copy (data);
+
+ return NULL;
+}
+
+/**
+ * gst_data_free:
+ * @data: a #GstData to free
+ *
+ * Frees the given #GstData
+ */
+void
+gst_data_free (GstData *data)
+{
+ if (data->free)
+ data->free (data);
+}
+
+/**
+ * gst_data_ref:
+ * @data: a #GstData to reference
+ *
+ * Increments the reference count of this data.
+ *
+ * Returns: the data
+ */
+GstData*
+gst_data_ref (GstData *data)
+{
+ g_return_val_if_fail (data != NULL, NULL);
+ g_return_val_if_fail (GST_DATA_REFCOUNT_VALUE(data) > 0, NULL);
+
+ GST_ATOMIC_INT_INC (&data->refcount);
+
+ return data;
+}
+
+/**
+ * gst_data_ref_by_count:
+ * @data: a #GstData to reference
+ * @count: the number to increment the reference count by
+ *
+ * Increments the reference count of this data by the given number.
+ *
+ * Returns: the data
+ */
+GstData*
+gst_data_ref_by_count (GstData *data, gint count)
+{
+ g_return_val_if_fail (data != NULL, NULL);
+ g_return_val_if_fail (count >= 0, NULL);
+ g_return_val_if_fail (GST_DATA_REFCOUNT_VALUE(data) > 0, NULL);
+
+ GST_ATOMIC_INT_ADD (&data->refcount, count);
+
+ return data;
+}
+
+/**
+ * gst_data_unref:
+ * @data: a #GstData to unreference
+ *
+ * Decrements the refcount of this data. If the refcount is
+ * zero, the data will be freeed.
+ */
+void
+gst_data_unref (GstData *data)
+{
+ gint zero;
+
+ g_return_if_fail (data != NULL);
+
+ GST_INFO (GST_CAT_BUFFER, "unref data %p, current count is %d", data,GST_DATA_REFCOUNT_VALUE(data));
+ g_return_if_fail (GST_DATA_REFCOUNT_VALUE(data) > 0);
+
+ GST_ATOMIC_INT_DEC_AND_TEST (&data->refcount, &zero);
+
+ /* if we ended up with the refcount at zero, free the data */
+ if (zero) {
+ if (data->free)
+ data->free (data);
+ }
+}
+
--- /dev/null
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ * 2000 Wim Taymans <wtay@chello.be>
+ *
+ * gstdata.c: Data operations
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#define _GST_DATA_INIT(data, ptype, pflags, pfree, pcopy) \
+G_STMT_START { \
+ GST_ATOMIC_INT_INIT (&(data)->refcount, 1); \
+ (data)->type = ptype; \
+ (data)->flags = pflags; \
+ (data)->free = pfree; \
+ (data)->copy = pcopy; \
+} G_STMT_END;
+
+#define _GST_DATA_DISPOSE(data) \
+G_STMT_START { \
+ GST_ATOMIC_INT_FREE (&(data)->refcount); \
+} G_STMT_END;
+
--- /dev/null
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <string.h> /* memset */
+
+#include "gstlog.h"
+#include "gstmemchunk.h"
+#include "gstutils.h"
+
+#define GST_MEM_CHUNK_AREA(chunk) (((GstMemChunkElement*)(chunk))->area)
+#define GST_MEM_CHUNK_DATA(chunk) ((gpointer)(((GstMemChunkElement*)(chunk)) + 1))
+#define GST_MEM_CHUNK_LINK(mem) ((GstMemChunkElement*)((guint8*)(mem) - sizeof (GstMemChunkElement)))
+
+/*******************************************************
+ * area size
+ * +-----------------------------------------+
+ * chunk size
+ * +------------+
+ *
+ * !next!data... !next!data.... !next!data...
+ * ! ^ ! ^ !
+ * +-------------+ +------------+ +---> NULL
+ *
+ */
+static gboolean
+populate (GstMemChunk *mem_chunk)
+{
+ guint8 *area;
+ gint i;
+
+ if (mem_chunk->cleanup)
+ return FALSE;
+
+ area = (guint8 *) g_malloc0 (mem_chunk->area_size);
+
+ for (i=0; i < mem_chunk->area_size; i += mem_chunk->chunk_size) {
+ GST_MEM_CHUNK_AREA (area + i) = (GstMemChunkElement *)area;
+ gst_mem_chunk_free (mem_chunk, GST_MEM_CHUNK_DATA (area + i));
+ }
+
+ return TRUE;
+}
+
+
+GstMemChunk*
+gst_mem_chunk_new (gchar* name, gint atom_size, gulong area_size, gint type)
+{
+ GstMemChunk *mem_chunk;
+
+ g_return_val_if_fail (atom_size > 0, NULL);
+ g_return_val_if_fail (area_size >= atom_size, NULL);
+
+ mem_chunk = g_malloc (sizeof (GstMemChunk));
+
+ mem_chunk->chunk_size = atom_size + sizeof (GstMemChunkElement);
+ area_size = (area_size/atom_size) * mem_chunk->chunk_size;
+
+ mem_chunk->name = g_strdup (name);
+ mem_chunk->atom_size = atom_size;
+ mem_chunk->area_size = area_size;
+ mem_chunk->cleanup = FALSE;
+ GST_ATOMIC_SWAP_INIT (&mem_chunk->swap, NULL);
+
+ populate (mem_chunk);
+
+ return mem_chunk;
+}
+
+static gboolean
+free_area (gpointer key, gpointer value, gpointer user_data)
+{
+ g_free (key);
+
+ return TRUE;
+}
+
+void
+gst_mem_chunk_destroy (GstMemChunk *mem_chunk)
+{
+ GHashTable *elements = g_hash_table_new (NULL, NULL);
+ gpointer data;
+
+ mem_chunk->cleanup = TRUE;
+
+ data = gst_mem_chunk_alloc (mem_chunk);
+ while (data) {
+ GstMemChunkElement *elem = GST_MEM_CHUNK_LINK (data);
+
+ g_hash_table_insert (elements, GST_MEM_CHUNK_AREA (elem), NULL);
+
+ data = gst_mem_chunk_alloc (mem_chunk);
+ }
+ g_hash_table_foreach_remove (elements, free_area, NULL);
+
+ g_hash_table_destroy (elements);
+ g_free (mem_chunk->name);
+ g_free (mem_chunk);
+}
+
+gpointer
+gst_mem_chunk_alloc (GstMemChunk *mem_chunk)
+{
+ GstMemChunkElement *chunk = NULL;
+
+ g_return_val_if_fail (mem_chunk != NULL, NULL);
+
+again:
+ GST_ATOMIC_SWAP_GET (&mem_chunk->swap,
+ GST_ATOMIC_SWAP_VALUE (&mem_chunk->swap),
+ &chunk);
+
+ if (!chunk) {
+ if (populate (mem_chunk))
+ goto again;
+ else
+ return NULL;
+ }
+ return GST_MEM_CHUNK_DATA (chunk);
+}
+
+gpointer
+gst_mem_chunk_alloc0 (GstMemChunk *mem_chunk)
+{
+ gpointer mem = gst_mem_chunk_alloc (mem_chunk);
+
+ if (mem)
+ memset (mem, 0, mem_chunk->atom_size);
+
+ return mem;
+}
+
+void
+gst_mem_chunk_free (GstMemChunk *mem_chunk, gpointer mem)
+{
+ GstMemChunkElement *chunk;
+
+ g_return_if_fail (mem_chunk != NULL);
+ g_return_if_fail (mem != NULL);
+
+ chunk = GST_MEM_CHUNK_LINK (mem);
+
+ GST_ATOMIC_SWAP (&mem_chunk->swap, &chunk->link);
+}
--- /dev/null
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GST_MEM_CHUNK_H__
+#define __GST_MEM_CHUNK_H__
+
+#include <glib.h>
+#include <gst/gstatomic.h>
+
+G_BEGIN_DECLS
+
+typedef struct _GstMemChunk GstMemChunk;
+typedef struct _GstMemChunkElement GstMemChunkElement;
+
+struct _GstMemChunkElement
+{
+ GstMemChunkElement *link; /* next cell in the lifo */
+ GstMemChunkElement *area;
+};
+
+struct _GstMemChunk
+{
+#if 0
+ volatile GstMemChunkElement *free; /* the first free element */
+ volatile gulong cnt; /* used to avoid ABA problem */
+#endif
+ GstAtomicSwap swap;
+
+ gchar *name;
+ gulong area_size;
+ gulong chunk_size;
+ gulong atom_size;
+ gboolean cleanup;
+ GMutex *lock;
+};
+
+GstMemChunk* gst_mem_chunk_new (gchar *name,
+ gint atom_size,
+ gulong area_size,
+ gint type);
+
+void gst_mem_chunk_destroy (GstMemChunk *mem_chunk);
+
+gpointer gst_mem_chunk_alloc (GstMemChunk *mem_chunk);
+gpointer gst_mem_chunk_alloc0 (GstMemChunk *mem_chunk);
+void gst_mem_chunk_free (GstMemChunk *mem_chunk,
+ gpointer mem);
+
+G_END_DECLS
+
+#endif /* __GST_MEM_CHUNK_H__ */
projects / platform / upstream / gstreamer.git / commitdiff