Start adding get_total_mem callback

frontend/drivers/platform_ctr.c

@@ -278,5 +278,6 @@ frontend_ctx_driver_t frontend_ctx_ctr = {
    frontend_ctr_get_architecture,
    NULL,                         /* get_powerstate */
    frontend_ctr_parse_drive_list,
+   NULL,                         /* get_mem_total */
    "ctr",
 };

frontend/drivers/platform_darwin.m

@@ -681,5 +681,6 @@ frontend_ctx_driver_t frontend_ctx_darwin = {
    frontend_darwin_get_architecture,
    frontend_darwin_get_powerstate,
    frontend_darwin_parse_drive_list,
+   NULL,                         /* get_mem_total */
    "darwin",
 };

frontend/drivers/platform_gx.c

@@ -501,5 +501,6 @@ frontend_ctx_driver_t frontend_ctx_gx = {
    frontend_gx_get_architecture,
    NULL,                            /* get_powerstate */
    frontend_gx_parse_drive_list,
+   NULL,                            /* get_mem_total */
    "gx",
 };

frontend/drivers/platform_linux.c

@@ -1881,6 +1881,13 @@ static void frontend_linux_exitspawn(char *core_path, size_t core_path_size)
 }
 #endif
 
+static uint32_t frontend_linux_get_mem_total(void)
+{
+   long pages     = sysconf(_SC_PHYS_PAGES);
+   long page_size = sysconf(_SC_PAGE_SIZE);
+   return pages * page_size;
+}
+
 frontend_ctx_driver_t frontend_ctx_linux = {
    frontend_linux_get_env,       /* environment_get */
    frontend_linux_init,          /* init */
@@ -1912,9 +1919,13 @@ frontend_ctx_driver_t frontend_ctx_linux = {
    frontend_linux_get_powerstate,
 #ifdef ANDROID
    frontend_android_parse_drive_list, /* parse_drive_list */
-   "android",
 #else
    NULL,                         /* parse_drive_list */
-   "linux",
+#endif
+   frontend_linux_get_mem_total,
+#ifdef ANDROID
+   "android"
+#else
+   "linux"
 #endif
 };

frontend/drivers/platform_null.c

@@ -35,5 +35,6 @@ frontend_ctx_driver_t frontend_ctx_null = {
    NULL,                         /* get_architecture */
    NULL,                         /* get_powerstate */
    NULL,                         /* parse_drive_list */
+   NULL,                         /* get_mem_total */
    "null",
 };

frontend/drivers/platform_ps3.c

@@ -539,5 +539,6 @@ frontend_ctx_driver_t frontend_ctx_ps3 = {
    frontend_ps3_get_architecture,
    NULL,                         /* get_powerstate */
    frontend_ps3_parse_drive_list,
+   NULL,                         /* get_mem_total */
    "ps3",
 };

frontend/drivers/platform_psp.c

@@ -404,6 +404,7 @@ frontend_ctx_driver_t frontend_ctx_psp = {
    frontend_psp_get_architecture,
    frontend_psp_get_powerstate,
    frontend_psp_parse_drive_list,
+   NULL,                         /* get_mem_total */
 #ifdef VITA
    "vita",
 #else

frontend/drivers/platform_qnx.c

@@ -84,5 +84,6 @@ frontend_ctx_driver_t frontend_ctx_qnx = {
    frontend_qnx_get_architecture,
    NULL,                         /* get_powerstate */
    NULL,                         /* parse_drive_list */
+   NULL,                         /* get_mem_total */
    "qnx",
 };

frontend/drivers/platform_win32.c

@@ -316,5 +316,6 @@ frontend_ctx_driver_t frontend_ctx_win32 = {
    frontend_win32_get_architecture,
    frontend_win32_get_powerstate,
    frontend_win32_parse_drive_list,
+   NULL,                           /* get_mem_total */
    "win32",
 };

frontend/drivers/platform_xdk.cpp

@@ -1406,5 +1406,6 @@ frontend_ctx_driver_t frontend_ctx_xdk = {
    frontend_xdk_get_architecture,
    NULL,                         /* get_powerstate */
    frontend_xdk_parse_drive_list,
+   NULL,                         /* get_mem_total */
    "xdk",
 };

frontend/drivers/platform_xenon.c

@@ -84,5 +84,6 @@ frontend_ctx_driver_t frontend_ctx_qnx = {
    frontend_xenon_get_architecture,
    NULL,                         /* get_powerstate */
    NULL,                         /* parse_drive_list */
+   NULL,                         /* get_mem_total */
    "xenon",
 };

frontend/frontend_driver.c

@@ -308,4 +308,12 @@ enum frontend_architecture frontend_driver_get_cpu_architecture(void)
       return FRONTEND_ARCH_NONE;
    return frontend->get_architecture();
 }
+
+uint32_t frontend_driver_get_total_memory(void)
+{
+   frontend_ctx_driver_t *frontend = frontend_get_ptr();
+   if (!frontend || !frontend->get_total_mem)
+      return 0;
+   return frontend->get_total_mem();
+}
 #endif

frontend/frontend_driver.h

@@ -17,6 +17,7 @@
 #ifndef __FRONTEND_DRIVER_H
 #define __FRONTEND_DRIVER_H
 
+#include <stdint.h>
 #include <stddef.h>
 
 #include <boolean.h>
@@ -79,6 +80,7 @@ typedef struct frontend_ctx_driver
    enum frontend_architecture (*get_architecture)(void);
    enum frontend_powerstate (*get_powerstate)(int *seconds, int *percent);
    int  (*parse_drive_list)(void*);
+   uint32_t (*get_total_mem)(void);
 
    const char *ident;
 
@@ -152,6 +154,8 @@ bool frontend_driver_get_core_extension(char *s, size_t len);
 
 bool frontend_driver_get_salamander_basename(char *s, size_t len);
 
+uint32_t frontend_driver_get_total_memory(void);
+
 RETRO_END_DECLS
 
 #endif