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Fix Linux build error 

- Simplified the implementation and made it more POSIX based and less macOS.
- Handle the rare failure case on older macOS versions.
This commit is contained in:
Allen Cronce 2022-12-04 09:09:59 -08:00
parent 7fdb0e919b
commit 197fd2617a
1 changed files with 23 additions and 20 deletions
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43
code/sys/sys_main.c
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@ -682,39 +682,42 @@ void Sys_SigHandler( int signal )
}
/*
=================
Sys_SetFileLimit
=================
*/
const size_t kUnlimitedNumberOfFiles = 0;
=================
Sys_SetFileLimit
=================
*/
#ifdef _WIN32
static int Sys_SetFileLimit(const size_t inNumFiles)
static int Sys_SetMaxFileLimit(void)
{
// A Windows implementation of this function probably is not needed.
return 0;
}
#else
#include <sys/resource.h>
#if !defined(MIN)
# define MIN(i, j) (((i) < (j)) ? (i) : (j))
#endif
static int Sys_SetFileLimit(const size_t inNumFiles)
static int Sys_SetMaxFileLimit(void)
{
int result = 0;
#if defined(RLIMIT_NOFILE)
// Get the current open file limit.
struct rlimit limit;
int result = getrlimit(RLIMIT_NOFILE, &limit);
result = getrlimit(RLIMIT_NOFILE, &limit);
if (0 == result)
{
// Figure out the new limit. Note that according to the Max OS X man page, we have to limit
// the value by the constant OPEN_MAX.
rlim_t requestedCurLimit = (kUnlimitedNumberOfFiles == inNumFiles) ? limit.rlim_max : (rlim_t)inNumFiles;
size_t actualLimitRequested = MIN((rlim_t)OPEN_MAX, requestedCurLimit);
// Set the new limit
limit.rlim_cur = actualLimitRequested;
// Set the file limit to the maximum
limit.rlim_cur = limit.rlim_max;
result = setrlimit(RLIMIT_NOFILE, &limit);
assert( 0 == result );
# if defined(__APPLE__) && defined(OPEN_MAX)
// On older macOS versions an error can happen trying to set a file limit above
// OPEN_MAX. If we see an error, then try again with OPEN_MAX as the limit.
if (result)
{
limit.rlim_cur = OPEN_MAX;
result = setrlimit(RLIMIT_NOFILE, &limit);
} // Error on first attempt to set the limit
# endif // Apple
} // No error getting the current file limit
#endif // defined(RLIMIT_NOFILE)
return result;
}
@ -733,7 +736,7 @@ int main( int argc, char **argv )
// Set the maximum number of files. Unlimited maps! Must be called early on before any
// system calls latch the default limit in place.
{
int result = Sys_SetFileLimit(kUnlimitedNumberOfFiles);
int result = Sys_SetMaxFileLimit();
if (result)
{
Com_Printf("Error trying to set the maxumim file limit: %d\n", result);