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engine: platform: linux: Add gettid definition for old systems

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The gettid() library support was added in glibc 2.30. Earlier glibc
versions did not provide a wrapper for this system call, necessitating
the use of syscall(2).

Also, put _GNU_SOURCE definition in the guard to avoid the warning:
  ../engine/platform/linux/sys_linux.c:16: warning: "_GNU_SOURCE" redefined
   #define _GNU_SOURCE

  <command-line>: note: this is the location of the previous definition
This commit is contained in:
Ruslan Piasetskyi 2024-01-05 13:59:16 +01:00 committed by Alibek Omarov
parent 315aea1991
commit 15bc09b06b
1 changed files with 16 additions and 0 deletions
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16
engine/platform/linux/sys_linux.c
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@ -13,7 +13,10 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details. GNU General Public License for more details.
*/ */
#ifndef _GNU_SOURCE
#define _GNU_SOURCE #define _GNU_SOURCE
#endif
#include <time.h> #include <time.h>
#include <stdlib.h> #include <stdlib.h>
#include <fcntl.h> #include <fcntl.h>
@ -24,6 +27,19 @@ GNU General Public License for more details.
#include <unistd.h> #include <unistd.h>
#include <math.h> #include <math.h>
#include "platform/platform.h" #include "platform/platform.h"
#include <sys/types.h>
#if defined(__GLIBC__) && (__GLIBC__ <= 2) && (__GLIBC_MINOR__ <= 30)
// Library support was added in glibc 2.30.
// Earlier glibc versions did not provide a wrapper for this system call,
// necessitating the use of syscall(2).
#include <sys/syscall.h>
static pid_t gettid( void )
{
return syscall( SYS_gettid );
}
#endif
static void *g_hsystemd; static void *g_hsystemd;
static int (*g_pfn_sd_notify)( int unset_environment, const char *state ); static int (*g_pfn_sd_notify)( int unset_environment, const char *state );