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sys/shell: reduce overhead of XFA shell commands

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We do not need to add an array of pointers to the shell commands, just
an array of shell commands is sufficient. This reduced the overhead of
XFA by `sizeof(void *)` per command.
This commit is contained in:
Marian Buschsieweke 2024-11-06 18:22:56 +01:00
parent 2be92b5e55
commit a7e251509d
No known key found for this signature in database
GPG Key ID: 758BD52517F79C41
2 changed files with 10 additions and 12 deletions
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7
sys/include/shell.h
View File

@ -302,15 +302,14 @@ int shell_parse_file(const shell_command_t *commands,
* ```
*/
#define SHELL_COMMAND(cmd, help, func) \
XFA_USE_CONST(shell_command_xfa_t*, shell_commands_xfa); \
XFA_USE_CONST(shell_command_xfa_t, shell_commands_xfa_v2); \
static FLASH_ATTR const char _xfa_ ## cmd ## _cmd_name[] = #cmd; \
static FLASH_ATTR const char _xfa_ ## cmd ## _cmd_desc[] = help; \
static const shell_command_xfa_t _xfa_ ## cmd ## _cmd = { \
XFA_CONST(shell_command_xfa_t, shell_commands_xfa_v2, 0) _xfa_ ## cmd ## _cmd = { \
.name = _xfa_ ## cmd ## _cmd_name, \
.desc = _xfa_ ## cmd ## _cmd_desc, \
.handler = &func \
}; \
XFA_ADD_PTR(shell_commands_xfa, cmd, cmd, &_xfa_ ## cmd ## _cmd)
};
#endif /* __cplusplus */
#ifdef __cplusplus

15
sys/shell/shell.c
View File

@ -36,7 +36,6 @@
#include <assert.h>
#include <errno.h>
#include "kernel_defines.h"
#include "xfa.h"
#include "shell.h"
#include "shell_lock.h"
@ -47,7 +46,7 @@
#endif
/* define shell command cross file array */
XFA_INIT_CONST(shell_command_xfa_t*, shell_commands_xfa);
XFA_INIT_CONST(shell_command_xfa_t, shell_commands_xfa_v2);
#define ETX '\x03' /** ASCII "End-of-Text", or Ctrl-C */
#define EOT '\x04' /** ASCII "End-of-Transmission", or Ctrl-D */
@ -102,10 +101,10 @@ static shell_command_handler_t search_commands(const shell_command_t *entry,
static shell_command_handler_t search_commands_xfa(char *command)
{
unsigned n = XFA_LEN(shell_command_t*, shell_commands_xfa);
unsigned n = XFA_LEN(shell_command_t, shell_commands_xfa_v2);
for (unsigned i = 0; i < n; i++) {
const volatile shell_command_xfa_t *entry = shell_commands_xfa[i];
const volatile shell_command_xfa_t *entry = &shell_commands_xfa_v2[i];
if (flash_strcmp(command, entry->name) == 0) {
return entry->handler;
}
@ -147,7 +146,7 @@ static void print_commands_json(const shell_command_t *cmd_list)
}
}
unsigned n = XFA_LEN(shell_command_xfa_t*, shell_commands_xfa);
unsigned n = XFA_LEN(shell_command_xfa_t, shell_commands_xfa_v2);
for (unsigned i = 0; i < n; i++) {
if (first) {
first = false;
@ -155,7 +154,7 @@ static void print_commands_json(const shell_command_t *cmd_list)
else {
printf(", ");
}
const volatile shell_command_xfa_t *entry = shell_commands_xfa[i];
const volatile shell_command_xfa_t *entry = &shell_commands_xfa_v2[i];
printf("{\"cmd\": \"%s\", \"desc\": \"%s\"}", entry->name, entry->desc);
}
puts("]}");
@ -170,9 +169,9 @@ static void print_commands(const shell_command_t *entry)
static void print_commands_xfa(void)
{
unsigned n = XFA_LEN(shell_command_xfa_t*, shell_commands_xfa);
unsigned n = XFA_LEN(shell_command_xfa_t, shell_commands_xfa_v2);
for (unsigned i = 0; i < n; i++) {
const volatile shell_command_xfa_t *entry = shell_commands_xfa[i];
const volatile shell_command_xfa_t *entry = &shell_commands_xfa_v2[i];
printf("%-20" PRIsflash " %" PRIsflash "\n",
entry->name, entry->desc);
}