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Multithread the exec command

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The command itself can be entirely multithreaded, but the reason I did so was
just for findfile, which can block for a long time on a slow disk.
This commit is contained in:
James R 2020-08-15 20:55:44 -07:00
parent c334230bb0
commit d0e7ba309a
1 changed files with 103 additions and 31 deletions
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134
src/command.c
View file

@ -34,6 +34,17 @@
#include "p_setup.h"
#include "lua_script.h"
#include "d_netfil.h" // findfile
#include "i_threads.h"
#ifdef HAVE_THREADS
static I_mutex com_text_mutex;
# define Lock_state() I_lock_mutex(&com_text_mutex)
# define Unlock_state() I_unlock_mutex(com_text_mutex)
#else/*HAVE_THREADS*/
# define Lock_state()
# define Unlock_state()
#endif/*HAVE_THREADS*/
//========
// protos.
@ -119,12 +130,14 @@ void COM_BufAddText(const char *ptext)
l = strlen(ptext);
Lock_state();
if (com_text.cursize + l >= com_text.maxsize)
{
CONS_Alert(CONS_WARNING, M_GetText("Command buffer full!\n"));
return;
}
VS_Write(&com_text, ptext, l);
else
VS_Write(&com_text, ptext, l);
Unlock_state();
}
/** Adds command text and executes it immediately.
@ -137,6 +150,8 @@ void COM_BufInsertText(const char *ptext)
char *temp = NULL;
size_t templen;
Lock_state();
// copy off any commands still remaining in the exec buffer
templen = com_text.cursize;
if (templen)
@ -155,6 +170,8 @@ void COM_BufInsertText(const char *ptext)
VS_Write(&com_text, temp, templen);
Z_Free(temp);
}
Unlock_state();
}
/** Progress the wait timer and flush waiting console commands when ready.
@ -180,6 +197,8 @@ void COM_BufExecute(void)
char line[1024] = "";
INT32 quotes;
Lock_state();
while (com_text.cursize)
{
// find a '\n' or; line break
@ -227,6 +246,8 @@ void COM_BufExecute(void)
break;
}
}
Unlock_state();
}
/** Executes a string immediately. Used for skirting around WAIT commands.
@ -672,12 +693,79 @@ static void COM_CEchoDuration_f(void)
HU_SetCEchoDuration(atoi(COM_Argv(1)));
}
struct COM_Exec_Ctx
{
char * filename;
boolean noerror;
boolean silent;
UINT8 * buf;
};
static void Free_COM_Exec_Ctx (struct COM_Exec_Ctx *ctx)
{
Z_Free(ctx->buf);
free(ctx->filename);
free(ctx);
}
static void COM_Exec_Thread (struct COM_Exec_Ctx *ctx)
{
char filename[256];
ctx->buf = NULL;
// load file
// Try with Argv passed verbatim first, for back compat
FIL_ReadFile(ctx->filename, &buf);
#ifdef HAVE_THREADS
if (I_thread_is_stopped())
{
return Free_COM_Exec_Ctx(ctx);
}
#endif
if (!buf)
{
// Now try by searching the file path
// filename is modified with the full found path
strcpy(filename, ctx->filename);
if (findfile(filename, NULL, true) != FS_NOTFOUND)
FIL_ReadFile(filename, &buf);
#ifdef HAVE_THREADS
if (I_thread_is_stopped())
{
return Free_COM_Exec_Ctx(ctx);
}
#endif
}
if (buf)
{
if (! ctx->silent)
CONS_Printf(M_GetText("executing %s\n"), ctx->filename);
// insert text file into the command buffer
COM_BufAddText((char *)buf);
COM_BufAddText("\n");
// free buffer
Z_Free(buf);
}
else
{
if (! ctx->noerror)
CONS_Printf(M_GetText("couldn't execute file %s\n"), ctx->filename);
}
}
/** Executes a script file.
*/
static void COM_Exec_f(void)
{
UINT8 *buf = NULL;
char filename[256];
struct COM_Exec_Ctx *ctx;
if (COM_Argc() < 2 || COM_Argc() > 3)
{
@ -685,35 +773,19 @@ static void COM_Exec_f(void)
return;
}
// load file
// Try with Argv passed verbatim first, for back compat
FIL_ReadFile(COM_Argv(1), &buf);
ctx = malloc(sizeof *ctx);
if (!buf)
{
// Now try by searching the file path
// filename is modified with the full found path
strcpy(filename, COM_Argv(1));
if (findfile(filename, NULL, true) != FS_NOTFOUND)
FIL_ReadFile(filename, &buf);
ctx->filename = strdup(COM_Argv(1));
if (!buf)
{
if (!COM_CheckParm("-noerror"))
CONS_Printf(M_GetText("couldn't execute file %s\n"), COM_Argv(1));
return;
}
}
ctx->noerror = COM_CheckParm("-noerror");
ctx->silent = COM_CheckParm("-silent");
if (!COM_CheckParm("-silent"))
CONS_Printf(M_GetText("executing %s\n"), COM_Argv(1));
#ifdef HAVE_THREADS
I_spawn_thread("exec-command", (I_thread_fn)COM_Exec_Thread, ctx);
#else
COM_Exec_Thread(ctx);
#endif
// insert text file into the command buffer
COM_BufAddText((char *)buf);
COM_BufAddText("\n");
// free buffer
Z_Free(buf);
}
/** Delays execution of the rest of the commands until the next frame.