prepare for the release of rrdtool-1.3.0

[rrdtool.git] / src / rrd_open.c

diff --git a/src/rrd_open.c b/src/rrd_open.c
index b5b3865..f5dadbf 100644 (file)
--- a/src/rrd_open.c
+++ b/src/rrd_open.c
@@ -1,5 +1,5 @@
 /*****************************************************************************
- * RRDtool 1.3rc3  Copyright by Tobi Oetiker, 1997-2008
+ * RRDtool 1.3.0  Copyright by Tobi Oetiker, 1997-2008
  *****************************************************************************
  * rrd_open.c  Open an RRD File
  *****************************************************************************
@@ -34,10 +34,11 @@
 #endif
 
 /* get the address of the start of this page */
+#if defined USE_MADVISE || defined HAVE_POSIX_FADVISE
 #ifndef PAGE_START
 #define PAGE_START(addr) ((addr)&(~(_page_size-1)))
 #endif
-
+#endif
 
 /* Open a database file, return its header and an open filehandle,
  * positioned to the first cdp in the first rra.
@@ -116,6 +117,10 @@ rrd_file_t *rrd_open(
 #endif
     }
 
+#if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
+    flags |= O_BINARY;
+#endif
+
     if ((rrd_file->fd = open(file_name, flags, mode)) < 0) {
         rrd_set_error("opening '%s': %s", file_name, rrd_strerror(errno));
         goto out_free;
@@ -226,12 +231,14 @@ rrd_file_t *rrd_open(
             rrd_set_error("live_head_t malloc");
             goto out_close;
         }
-#ifdef HAVE_MMAP
-        memmove(&rrd->live_head->last_up, data + offset, sizeof(long));
-        offset += sizeof(long);
-#else
-        offset += read(rrd_file->fd, &rrd->live_head->last_up, sizeof(long));
+#if defined USE_MADVISE
+        /* the live_head will be needed soonish, so hint accordingly */
+        madvise(data + PAGE_START(offset), sizeof(time_t), MADV_WILLNEED);
 #endif
+        __rrd_read(rrd->legacy_last_up, time_t,
+                   1);
+
+        rrd->live_head->last_up = *rrd->legacy_last_up;
         rrd->live_head->last_up_usec = 0;
     } else {
 #if defined USE_MADVISE
@@ -314,6 +321,7 @@ void rrd_dontneed(
     rrd_file_t *rrd_file,
     rrd_t *rrd)
 {
+#if defined USE_MADVISE || defined HAVE_POSIX_FADVISE
     unsigned long dontneed_start;
     unsigned long rra_start;
     unsigned long active_block;
@@ -367,8 +375,13 @@ void rrd_dontneed(
 #if defined DEBUG && DEBUG > 1
     mincore_print(rrd_file, "after");
 #endif
+#endif                          /* without madvise and posix_fadvise ist does not make much sense todo anything */
 }
 
+
+
+
+
 int rrd_close(
     rrd_file_t *rrd_file)
 {
@@ -512,6 +525,7 @@ void rrd_init(
     rrd->ds_def = NULL;
     rrd->rra_def = NULL;
     rrd->live_head = NULL;
+    rrd->legacy_last_up = NULL;
     rrd->rra_ptr = NULL;
     rrd->pdp_prep = NULL;
     rrd->cdp_prep = NULL;
@@ -522,9 +536,12 @@ void rrd_init(
 /* free RRD header data.  */
 
 #ifdef HAVE_MMAP
-inline void rrd_free(
-    rrd_t UNUSED(*rrd))
+void rrd_free(
+    rrd_t *rrd)
 {
+    if (rrd->legacy_last_up) {  /* this gets set for version < 3 only */
+        free(rrd->live_head);
+    }
 }
 #else
 void rrd_free(
@@ -550,64 +567,3 @@ void rrd_freemem(
 {
     free(mem);
 }
-
-
-/* XXX: FIXME: missing documentation.  */
-/*XXX: FIXME should be renamed to rrd_readfile or _rrd_readfile */
-
-int /*_rrd_*/ readfile(
-    const char *file_name,
-    char **buffer,
-    int skipfirst)
-{
-    long      writecnt = 0, totalcnt = MEMBLK;
-    long      offset = 0;
-    FILE     *input = NULL;
-    char      c;
-
-    if ((strcmp("-", file_name) == 0)) {
-        input = stdin;
-    } else {
-        if ((input = fopen(file_name, "rb")) == NULL) {
-            rrd_set_error("opening '%s': %s", file_name, rrd_strerror(errno));
-            return (-1);
-        }
-    }
-    if (skipfirst) {
-        do {
-            c = getc(input);
-            offset++;
-        } while (c != '\n' && !feof(input));
-    }
-    if (strcmp("-", file_name)) {
-        fseek(input, 0, SEEK_END);
-        /* have extra space for detecting EOF without realloc */
-        totalcnt = (ftell(input) + 1) / sizeof(char) - offset;
-        if (totalcnt < MEMBLK)
-            totalcnt = MEMBLK;  /* sanitize */
-        fseek(input, offset * sizeof(char), SEEK_SET);
-    }
-    if (((*buffer) = (char *) malloc((totalcnt + 4) * sizeof(char))) == NULL) {
-        perror("Allocate Buffer:");
-        exit(1);
-    };
-    do {
-        writecnt +=
-            fread((*buffer) + writecnt, 1,
-                  (totalcnt - writecnt) * sizeof(char), input);
-        if (writecnt >= totalcnt) {
-            totalcnt += MEMBLK;
-            if (((*buffer) =
-                 rrd_realloc((*buffer),
-                             (totalcnt + 4) * sizeof(char))) == NULL) {
-                perror("Realloc Buffer:");
-                exit(1);
-            };
-        }
-    } while (!feof(input));
-    (*buffer)[writecnt] = '\0';
-    if (strcmp("-", file_name) != 0) {
-        fclose(input);
-    };
-    return writecnt;
-}