[PATCH 1/2] Support for setitimer() on platforms lacking it
From: Joachim Schmitz <hidden>
Date: 2016-06-15 22:54:34
Subsystem:
the rest · Maintainer:
Linus Torvalds
Implementation includes getitimer(), but for now it is static. Supports ITIMER_REAL only. Signed-off-by: Joachim Schmitz <redacted> --- May need a header file for ITIMER_*, struct itimerval and the prototypes, But for now, and the HP NonStop platform this isn't needed, here <sys/time> has ITIMER_* and struct timeval, and the prototypes can vo into git-compat-util.h for now (Patch 2/2) compat/itimer.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 compat/itimer.c
diff --git a/compat/itimer.c b/compat/itimer.c
new file mode 100644
index 0000000..713f1ff
--- /dev/null
+++ b/compat/itimer.c@@ -0,0 +1,50 @@ +#include "../git-compat-util.h" + +static int git_getitimer(int which, struct itimerval *value) +{ + int ret = 0; + + switch (which) { + case ITIMER_REAL: + value->it_value.tv_usec = 0; + value->it_value.tv_sec = alarm(0); + ret = 0; /* if alarm() fails, we get a SIGLIMIT */ + break; + case ITIMER_VIRTUAL: /* FALLTHRU */ + case ITIMER_PROF: errno = ENOTSUP; ret = -1; break; + default: errno = EINVAL; ret = -1; + } + return ret; +} + +int git_setitimer(int which, const struct itimerval *value, + struct itimerval *ovalue) +{ + int ret = 0; + + if (!value + || value->it_value.tv_usec < 0 + || value->it_value.tv_usec > 1000000 + || value->it_value.tv_sec < 0) { + errno = EINVAL; + return -1; + } + + else if (ovalue) + if (!git_getitimer(which, ovalue)) + return -1; /* errno set in git_getitimer() */ + + else + switch (which) { + case ITIMER_REAL: + alarm(value->it_value.tv_sec + + (value->it_value.tv_usec > 0) ? 1 : 0); + ret = 0; /* if alarm() fails, we get a SIGLIMIT */ + break; + case ITIMER_VIRTUAL: /* FALLTHRU */ + case ITIMER_PROF: errno = ENOTSUP; ret = -1; break; + default: errno = EINVAL; ret = -1; + } + + return ret; +}
--
1.7.12