- updated to 8a (merged from libjpeg.spec)

[packages/crossmingw32-libjpeg.git] / libjpeg-maxmem-sysconf.patch

diff --git a/libjpeg-maxmem-sysconf.patch b/libjpeg-maxmem-sysconf.patch
new file mode 100644 (file)
index 0000000..b1c8d72
--- /dev/null
+++ b/libjpeg-maxmem-sysconf.patch
@@ -0,0 +1,49 @@
+# Make a reasonable guess about memory limits using sysconf().
+# includes 5% slop factor as suggested in documentation.
+
+--- jpeg-6b/jmemansi.c
++++ jpeg-6b/jmemansi.c
+@@ -12,6 +12,15 @@
+  * is shoved onto the user.
+  */
+ 
++#include <unistd.h>
++
++#ifdef __FreeBSD__
++# include <sys/types.h>
++# include <sys/sysctl.h>
++# include <sys/vmmeter.h>
++# include <vm/vm_param.h>
++#endif
++
+ #define JPEG_INTERNALS
+ #include "jinclude.h"
+ #include "jpeglib.h"
+@@ -157,7 +166,26 @@
+ GLOBAL(long)
+ jpeg_mem_init (j_common_ptr cinfo)
+ {
+-  return DEFAULT_MAX_MEM;     /* default for max_memory_to_use */
++#ifdef _SC_AVPHYS_PAGES
++  long phys_size;
++ 
++  if ((phys_size = sysconf(_SC_AVPHYS_PAGES)) == -1)
++    return DEFAULT_MAX_MEM; /* default for max_memory_to_use */
++  if ((phys_size *= sysconf(_SC_PAGESIZE)) < 0)
++    return DEFAULT_MAX_MEM;
++  return (long) (phys_size * 0.95);
++#elif defined(HAVE_SYSCTL) && defined(HW_PHYSMEM)
++  /* This works on *bsd and darwin.  */
++  unsigned int physmem;
++  size_t len = sizeof physmem;
++  static int mib[2] = { CTL_HW, HW_PHYSMEM };
++
++  if (sysctl (mib, ARRAY_SIZE (mib), &physmem, &len, NULL, 0) == 0
++      && len == sizeof (physmem))
++    return (long) (physmem * 0.95);
++#endif
++
++  return DEFAULT_MAX_MEM;
+ }
+ 
+ GLOBAL(void)