From e58afbca6e5cd698c09112d85de92a44861ea201 Mon Sep 17 00:00:00 2001
From: Carsten Haitzler <raster@rasterman.com>
Date: Fri, 2 Mar 2007 22:27:52 +0000
Subject: [PATCH] i've put back timestamp checks - but evas wont stata file
 more frequently than once per 2 seconds to avoid overhead.

SVN revision: 28532
---
 .../src/lib/engines/common/evas_image_load.c  |  2 +
 .../src/lib/engines/common/evas_image_main.c  | 52 +++++++++++++++++--
 legacy/evas/src/lib/include/evas_common.h     |  3 +-
 3 files changed, 52 insertions(+), 5 deletions(-)

diff --git a/legacy/evas/src/lib/engines/common/evas_image_load.c b/legacy/evas/src/lib/engines/common/evas_image_load.c
index 0d9222230a..a45b27160c 100644
--- a/legacy/evas/src/lib/engines/common/evas_image_load.c
+++ b/legacy/evas/src/lib/engines/common/evas_image_load.c
@@ -31,6 +31,8 @@ evas_common_load_image_from_file(const char *file, const char *key, RGBA_Image_L
    im = evas_common_image_new();
    if (!im) return NULL;
    
+   im->timestamp = st.st_mtime;
+   
    if (lo) im->load_opts = *lo;
    
    p = strrchr(file, '.');
diff --git a/legacy/evas/src/lib/engines/common/evas_image_main.c b/legacy/evas/src/lib/engines/common/evas_image_main.c
index dc5f655721..f5c197dfdb 100644
--- a/legacy/evas/src/lib/engines/common/evas_image_main.c
+++ b/legacy/evas/src/lib/engines/common/evas_image_main.c
@@ -468,6 +468,7 @@ evas_common_image_unstore(RGBA_Image *im)
    im->flags &= ~RGBA_IMAGE_INDEXED;
 }
 
+#define STAT_GAP 2
 
 EAPI RGBA_Image *
 evas_common_image_find(const char *file, const char *key, DATA64 timestamp, RGBA_Image_Loadopts *lo)
@@ -476,6 +477,8 @@ evas_common_image_find(const char *file, const char *key, DATA64 timestamp, RGBA
    RGBA_Image *im;
    char buf[4096 + 1024];
    Evas_Object_List *l;
+   struct stat st;
+   static time_t last_stat = 0, t, mt;
 
    if ((!file) && (!key)) return NULL;
    if (!file) return NULL;
@@ -498,29 +501,70 @@ evas_common_image_find(const char *file, const char *key, DATA64 timestamp, RGBA
 	  snprintf(buf, sizeof(buf), "//@/%i/%1.5f/%ix%i//%s", lo->scale_down_by, lo->dpi, lo->w, lo->h, file);
      }
    im = evas_hash_find(images, buf);
-   if (im) return im;
+   t = time();
+   if (im)
+     {
+	if ((t - last_stat) < STAT_GAP)
+	  return im;
+	else
+	  {
+	     struct stat st;
+	     
+	     if (stat(file, &st) != 0) return NULL;
+	     mt = st.st_mtime;
+	     if (mt == im->timestamp)
+	       {
+		  last_stat = t;
+		  return im;
+	       }
+	  }
+     }
+   else
+     {
+        if ((t - last_stat) >= STAT_GAP)
+	  {
+	     if (stat(file, &st) != 0) return NULL;
+	     mt = st.st_mtime;
+	     last_stat = t;
+	  }
+     }
+     
    for (l = cache; l; l = l->next)
      {
 	int ok;
-
+	
 	im = (RGBA_Image *)l;
-	ok = 0;
 	lo2 = &(im->load_opts);
+	ok = 0;
 	if ((file) && (im->info.file) &&
 	    (!strcmp(file, im->info.file)))
 	  ok++;
 	else if ((!file) && (!im->info.file))
 	  ok++;
+	else continue;
+	
 	if ((key) && (im->info.key) &&
 	    (!strcmp(key, im->info.key)))
 	  ok++;
 	else if ((!key) && (!im->info.key))
 	  ok++;
+	else continue;
+	
+        if ((t - last_stat) >= STAT_GAP)
+	  {
+	     if (im->timestamp == mt)
+	       ok++;
+	     else continue;
+	  }
+	else ok++;
+	
 	if ((lo->scale_down_by == lo2->scale_down_by) &&
 	    (lo->dpi == lo2->dpi) && (lo->w == lo2->w) && 
 	    (lo->h == lo2->h))
 	  ok++;
-	if (ok >= 3) return im;
+	else continue;
+	
+	return im;
      }
 /*
    for (l = cache; l; l = l->next)
diff --git a/legacy/evas/src/lib/include/evas_common.h b/legacy/evas/src/lib/include/evas_common.h
index fd28d44407..42e9c88056 100644
--- a/legacy/evas/src/lib/include/evas_common.h
+++ b/legacy/evas/src/lib/include/evas_common.h
@@ -46,6 +46,7 @@
 #include <signal.h>
 #include <setjmp.h>
 #include <sys/types.h>
+#include <sys/stat.h>
 #include <ctype.h>
 
 #ifdef HAVE_ALLOCA_H
@@ -347,7 +348,7 @@ struct _RGBA_Image
 	char           *comment;
      } info;
    int                  references;
-//   DATA64               timestamp;
+   time_t               timestamp;
    void                *extended_info;
    RGBA_Image_Loadopts  load_opts;
    unsigned char        scale;