1 files changed, 73 insertions, 3 deletions
diff --git a/core/src/xmake/os/meminfo.c b/core/src/xmake/os/meminfo.c
index 904d0797f..96e723790 100644
--- a/core/src/xmake/os/meminfo.c
+++ b/core/src/xmake/os/meminfo.c
@@ -29,23 +29,93 @@
  * includes
  */
 #include "prefix.h"
+#if defined(TB_CONFIG_OS_MACOSX)
+#   include <sys/sysctl.h>
+#   include <mach/mach.h>
+#   include <mach/machine.h>
+#   include <mach-o/dyld.h>
+#   include <mach-o/nlist.h>
+#endif
 
 /* //////////////////////////////////////////////////////////////////////////////////////
- * implementation
+ * private implementation
  */
 
+// get the used memory size (MB)
+static tb_bool_t xm_os_meminfo_vmstats(tb_int_t* vm_totalsize, tb_int_t* vm_availsize)
+{
+#if defined(TB_CONFIG_OS_MACOSX)
+    vm_statistics64_data_t vmstat;
+    mach_msg_type_number_t count = HOST_VM_INFO64_COUNT;
+    if (host_statistics64(mach_host_self(), HOST_VM_INFO64, (host_info_t) &vmstat, &count) == KERN_SUCCESS)
+    {
+        tb_int_t pagesize = (tb_int_t)tb_page_size();
+        tb_int64_t totalsize = (tb_int64_t)(vmstat.inactive_count + vmstat.free_count + vmstat.active_count + vmstat.wire_count + vmstat.compressor_page_count) * pagesize;
+        /*
+         * NB: speculative pages are already accounted for in "free_count",
+         * so "speculative_count" is the number of "free" pages that are
+         * used to hold data that was read speculatively from disk but
+         * haven't actually been used by anyone so far.
+         *
+         */
+        tb_int64_t availsize = (tb_int64_t)(vmstat.inactive_count + vmstat.free_count - vmstat.speculative_count) * pagesize;
+        *vm_totalsize = (tb_int_t)(totalsize / (1024 * 1024));
+        *vm_availsize = (tb_int_t)(availsize / (1024 * 1024));
+        return tb_true;
+    }
+#endif
+    return tb_false;
+}
+
+// get the total physical memory size (MB)
+static tb_int_t xm_os_meminfo_physmem()
+{
+#if defined(TB_CONFIG_OS_MACOSX)
+    tb_int_t mib[] = { CTL_HW, HW_MEMSIZE };
+    tb_int64_t value = 0;
+    size_t length = sizeof(value);
+    if (sysctl(mib, 2, &value, &length, tb_null, 0) == 0)
+        return (tb_int_t)(value / (1024 * 1024));
+#endif
+    return 0;
+}
+
+/* //////////////////////////////////////////////////////////////////////////////////////
+ * implementation
+ */
 tb_int_t xm_os_meminfo(lua_State* lua)
 {
     // check
     tb_assert_and_check_return_val(lua, 0);
 
+    // init table
     lua_newtable(lua);
 
-    // get pagesize
+    // get the pagesize
     tb_int_t pagesize = (tb_int_t)tb_page_size();
     lua_pushstring(lua, "pagesize");
-    lua_pushinteger(lua, pagesize > 0? pagesize : 1);
+    lua_pushinteger(lua, pagesize);
     lua_settable(lua, -3);
 
+    // get the total memory size
+    tb_int_t physmem = xm_os_meminfo_physmem();
+    lua_pushstring(lua, "physmem");
+    lua_pushinteger(lua, physmem);
+    lua_settable(lua, -3);
+
+    // get the vm memory info
+    tb_int_t vm_availsize = 0;
+    tb_int_t vm_totalsize = 0;
+    if (xm_os_meminfo_vmstats(&vm_totalsize, &vm_availsize))
+    {
+        lua_pushstring(lua, "vm_totalsize");
+        lua_pushinteger(lua, vm_totalsize);
+        lua_settable(lua, -3);
+
+        lua_pushstring(lua, "vm_availsize");
+        lua_pushinteger(lua, vm_availsize);
+        lua_settable(lua, -3);
+    }
+
     return 1;
 }