mirror of
https://github.com/microsoft/vcpkg.git
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76 lines
2.3 KiB
Diff
76 lines
2.3 KiB
Diff
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# HG changeset patch
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# User Sam Lantinga <slouken@libsdl.org>
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# Date 1542691020 28800
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# Node ID 9091b20040cf04cdc348d290ca22373b36364c39
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# Parent 144400e4630d885d2eb0761b7174433b4c0d90bb
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Fixed bug 4391 - hid_enumerate() sometimes causes game to freeze for a few seconds
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Daniel Gibson
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Even though my game (dhewm3) doesn't use SDL_INIT_JOYSTICK, SDL_PumpEvent() calls SDL_JoystickUpdate() which ends up calling hid_enumerate() every three seconds, and sometimes on my Win7 box hid_enumerate() takes about 5 seconds, which causes the whole game to freeze for that time.
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diff -r 144400e4630d -r 9091b20040cf include/SDL_bits.h
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--- a/include/SDL_bits.h Sun Nov 18 19:28:20 2018 +0300
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+++ b/include/SDL_bits.h Mon Nov 19 21:17:00 2018 -0800
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@@ -101,6 +101,15 @@
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#endif
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}
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+SDL_FORCE_INLINE SDL_bool
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+SDL_HasExactlyOneBitSet32(Uint32 x)
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+{
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+ if (x && !(x & (x - 1))) {
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+ return SDL_TRUE;
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+ }
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+ return SDL_FALSE;
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+}
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+
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/* Ends C function definitions when using C++ */
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#ifdef __cplusplus
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}
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diff -r 144400e4630d -r 9091b20040cf src/SDL.c
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--- a/src/SDL.c Sun Nov 18 19:28:20 2018 +0300
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+++ b/src/SDL.c Mon Nov 19 21:17:00 2018 -0800
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@@ -348,6 +348,12 @@
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int num_subsystems = SDL_arraysize(SDL_SubsystemRefCount);
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Uint32 initialized = 0;
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+ /* Fast path for checking one flag */
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+ if (SDL_HasExactlyOneBitSet32(flags)) {
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+ int subsystem_index = SDL_MostSignificantBitIndex32(flags);
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+ return SDL_SubsystemRefCount[subsystem_index] ? flags : 0;
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+ }
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+
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if (!flags) {
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flags = SDL_INIT_EVERYTHING;
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}
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diff -r 144400e4630d -r 9091b20040cf src/joystick/SDL_joystick.c
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--- a/src/joystick/SDL_joystick.c Sun Nov 18 19:28:20 2018 +0300
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+++ b/src/joystick/SDL_joystick.c Mon Nov 19 21:17:00 2018 -0800
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@@ -1016,6 +1016,10 @@
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int i;
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SDL_Joystick *joystick;
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+ if (!SDL_WasInit(SDL_INIT_JOYSTICK)) {
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+ return;
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+ }
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+
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SDL_LockJoysticks();
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if (SDL_updating_joystick) {
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diff -r 144400e4630d -r 9091b20040cf src/sensor/SDL_sensor.c
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--- a/src/sensor/SDL_sensor.c Sun Nov 18 19:28:20 2018 +0300
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+++ b/src/sensor/SDL_sensor.c Mon Nov 19 21:17:00 2018 -0800
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@@ -505,6 +505,10 @@
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int i;
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SDL_Sensor *sensor;
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+ if (!SDL_WasInit(SDL_INIT_SENSOR)) {
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+ return;
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+ }
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+
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SDL_LockSensors();
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if (SDL_updating_sensor) {
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