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(submit/cleanup-xi) Xi: use stack allocation for temporary buffers 

Small buffers easily fit on stack, which is much faster (just moving SP),
and alloca()'ed buffers are cleaned up automatically on function leave,
no extra free() needed.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
This commit is contained in:
Enrico Weigelt, metux IT consult 2024-07-11 09:22:12 +02:00
parent e7262542d5
commit 63f510ebf2
3 changed files with 4 additions and 11 deletions
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3
Xi/getdctl.c
View File

@ -153,7 +153,6 @@ int
ProcXGetDeviceControl(ClientPtr client)
{
int rc, total_length = 0;
char *savbuf;
DeviceIntPtr dev;
REQUEST(xGetDeviceControlReq);
@ -186,7 +185,7 @@ ProcXGetDeviceControl(ClientPtr client)
char *buf = calloc(1, total_length);
if (!buf)
return BadAlloc;
savbuf = buf;
char *savbuf = buf;
switch (stuff->control) {
case DEVICE_RESOLUTION:

4
Xi/getfctl.c
View File

@ -244,7 +244,6 @@ int
ProcXGetFeedbackControl(ClientPtr client)
{
int rc, total_length = 0;
char *savbuf;
DeviceIntPtr dev;
KbdFeedbackPtr k;
PtrFeedbackPtr p;
@ -298,7 +297,7 @@ ProcXGetFeedbackControl(ClientPtr client)
char *buf = (char *) calloc(1, total_length);
if (!buf)
return BadAlloc;
savbuf = buf;
char *savbuf = buf;
for (k = dev->kbdfeed; k; k = k->next)
CopySwapKbdFeedback(client, k, &buf);
@ -322,6 +321,5 @@ ProcXGetFeedbackControl(ClientPtr client)
}
WriteToClient(client, sizeof(xGetFeedbackControlReply), &rep);
WriteToClient(client, total_length, savbuf);
free(savbuf);
return Success;
}

8
Xi/xiselectev.c
View File

@ -342,7 +342,6 @@ ProcXIGetSelectedEvents(ClientPtr client)
{
int rc, i;
WindowPtr win;
char *buffer = NULL;
OtherInputMasks *masks;
InputClientsPtr others = NULL;
xXIEventMask *evmask = NULL;
@ -374,10 +373,8 @@ ProcXIGetSelectedEvents(ClientPtr client)
if (!others)
goto finish;
buffer =
calloc(MAXDEVICES, sizeof(xXIEventMask) + pad_to_int32(XI2MASKSIZE));
if (!buffer)
return BadAlloc;
char buffer[MAXDEVICES * (sizeof(xXIEventMask) + pad_to_int32(XI2MASKSIZE))];
memset(buffer, 0, sizeof(buffer));
evmask = (xXIEventMask *) buffer;
for (i = 0; i < MAXDEVICES; i++) {
@ -423,6 +420,5 @@ finish: ;
WriteToClient(client, sizeof(xXIGetSelectedEventsReply), &rep);
WriteToClient(client, length * 4, buffer);
free(buffer);
return Success;
}