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Code Issues Releases Wiki Activity

Retire now unused input_available()

Browse source 
With our new listener thread we don't need anymore
this ugly and platform dependent code.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2011-11-05 08:37:48 +01:00
parent 2617aa415e
commit 0095f423f2
2 changed files with 0 additions and 74 deletions
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73
src/misc.cpp
View file

@ -175,79 +175,6 @@ int cpu_count() {
}
/// Check for console input. Original code from Beowulf, Olithink and Greko
#ifndef _WIN32
int input_available() {
fd_set readfds;
struct timeval timeout;
FD_ZERO(&readfds);
FD_SET(fileno(stdin), &readfds);
timeout.tv_sec = 0; // Set to timeout immediately
timeout.tv_usec = 0;
select(16, &readfds, 0, 0, &timeout);
return (FD_ISSET(fileno(stdin), &readfds));
}
#else
int input_available() {
static HANDLE inh = NULL;
static bool usePipe = false;
INPUT_RECORD rec[256];
DWORD nchars, recCnt;
if (!inh)
{
inh = GetStdHandle(STD_INPUT_HANDLE);
if (GetConsoleMode(inh, &nchars))
{
SetConsoleMode(inh, nchars & ~(ENABLE_MOUSE_INPUT | ENABLE_WINDOW_INPUT));
FlushConsoleInputBuffer(inh);
} else
usePipe = true;
}
// When using Standard C input functions, also check if there
// is anything in the buffer. After a call to such functions,
// the input waiting in the pipe will be copied to the buffer,
// and the call to PeekNamedPipe can indicate no input available.
// Setting stdin to unbuffered was not enough. [from Greko]
if (stdin->_cnt > 0)
return 1;
// When running under a GUI the input commands are sent to us
// directly over the internal pipe. If PeekNamedPipe() returns 0
// then something went wrong. Probably the parent program exited.
// Returning 1 will make the next call to the input function
// return EOF, where this should be catched then.
if (usePipe)
return PeekNamedPipe(inh, NULL, 0, NULL, &nchars, NULL) ? nchars : 1;
// Count the number of unread input records, including keyboard,
// mouse, and window-resizing input records.
GetNumberOfConsoleInputEvents(inh, &nchars);
// Read data from console without removing it from the buffer
if (nchars <= 0 || !PeekConsoleInput(inh, rec, std::min(int(nchars), 256), &recCnt))
return 0;
// Search for at least one keyboard event
for (DWORD i = 0; i < recCnt; i++)
if (rec[i].EventType == KEY_EVENT)
return 1;
return 0;
}
#endif
/// prefetch() preloads the given address in L1/L2 cache. This is a non
/// blocking function and do not stalls the CPU waiting for data to be
/// loaded from memory, that can be quite slow.

1
src/misc.h
View file

@ -28,7 +28,6 @@ extern const std::string engine_name();
extern const std::string engine_authors();
extern int get_system_time();
extern int cpu_count();
extern int input_available();
extern void prefetch(char* addr);
extern void dbg_hit_on(bool b);