the support for PSE51 (#5534)

* [add] the function realization of signal for posix.
* [update] the posix support for armclang.
* [add] the new macro "RT_USING_POSIX_TIMER".
* [modify] select "RT_USING_SOFT_TIMER" when use posix'timer.
* [bug] optimize the logic for the "time_xxx" functions.
* [modify] use "RT_USING_POSIX_TIMER" to protect the macro definition.
* [modify] error code when except happened.
* [delete] the "environ" is useless at this time.

2 files changed, 65 insertions, 2 deletions

diff --git a/components/libc/compilers/common/sys/signal.h b/components/libc/compilers/common/sys/signal.h
index 9787958a37..041dd765b7 100644
--- a/components/libc/compilers/common/sys/signal.h
+++ b/components/libc/compilers/common/sys/signal.h
@@ -17,6 +17,19 @@ extern "C" {
 #endif
 
 #include <stdint.h>
+#include <sys/types.h>
+
+
+/* sigev_notify values
+   NOTE: P1003.1c/D10, p. 34 adds SIGEV_THREAD.  */
+
+#define SIGEV_NONE   1  /* No asynchronous notification shall be delivered */
+                        /*   when the event of interest occurs. */
+#define SIGEV_SIGNAL 2  /* A queued signal, with an application defined */
+                        /*  value, shall be delivered when the event of */
+                        /*  interest occurs. */
+#define SIGEV_THREAD 3  /* A notification function shall be called to */
+                        /*   perform notification. */
 
 /*  Signal Generation and Delivery, P1003.1b-1993, p. 63
     NOTE: P1003.1c/D10, p. 34 adds sigev_notify_function and
@@ -62,6 +75,16 @@ struct sigaction
     int sa_flags;
 };
 
+/*
+ * Structure used in sigaltstack call.
+ */
+typedef struct sigaltstack
+{
+  void     *ss_sp;    /* Stack base or pointer.  */
+  int       ss_flags; /* Flags.  */
+  size_t    ss_size;  /* Stack size.  */
+} stack_t;
+
 #define SIG_SETMASK 0   /* set mask with sigprocmask() */
 #define SIG_BLOCK   1   /* set of signals to block */
 #define SIG_UNBLOCK 2   /* set of signals to, well, unblock */
@@ -73,6 +96,15 @@ struct sigaction
 #define sigismember(what,sig) (((*(what)) & (1<<(sig))) != 0)
 
 int sigprocmask (int how, const sigset_t *set, sigset_t *oset);
+int sigpending (sigset_t *set);
+int sigsuspend (const sigset_t *set);
+
+#include "time.h"
+int sigtimedwait(const sigset_t *set, siginfo_t *info, const struct timespec *timeout);
+int sigwait(const sigset_t *set, int *sig);
+int sigwaitinfo(const sigset_t *set, siginfo_t *info);
+int raise(int sig);
+int sigqueue(pid_t pid, int signo, const union sigval value);
 int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact);
 
 #ifdef __ARMCC_VERSION
@@ -100,6 +132,9 @@ int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact)
 #define SIGTTOU     22
 #define SIGPOLL     23
 #define SIGWINCH    24
+#define SIGXCPU     24  /* exceeded CPU time limit */
+#define SIGXFSZ     25  /* exceeded file size limit */
+#define SIGVTALRM   26  /* virtual time alarm */
 /* #define SIGUSR1     25 */
 /* #define SIGUSR2     26 */
 #define SIGRTMIN    27
@@ -133,6 +168,9 @@ int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact)
 #define SIGTTOU     22
 #define SIGPOLL     23
 #define SIGWINCH    24
+#define SIGXCPU     24  /* exceeded CPU time limit */
+#define SIGXFSZ     25  /* exceeded file size limit */
+#define SIGVTALRM   26  /* virtual time alarm */
 #define SIGUSR1     25
 #define SIGUSR2     26
 #define SIGRTMIN    27
diff --git a/components/libc/compilers/common/sys/time.h b/components/libc/compilers/common/sys/time.h
index 758333796d..a3af31b20b 100644
--- a/components/libc/compilers/common/sys/time.h
+++ b/components/libc/compilers/common/sys/time.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2021, RT-Thread Development Team
+ * Copyright (c) 2006-2022, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -60,6 +60,16 @@ struct timespec
     time_t  tv_sec;     /* seconds */
     long    tv_nsec;    /* and nanoseconds */
 };
+
+/*
+ * Structure defined by POSIX.1b to be like a itimerval, but with
+ * timespecs. Used in the timer_*() system calls.
+ */
+struct itimerspec
+{
+    struct timespec  it_interval;
+    struct timespec  it_value;
+};
 #endif
 
 int stime(const time_t *t);
@@ -68,6 +78,9 @@ int gettimeofday(struct timeval *tv, struct timezone *tz);
 int settimeofday(const struct timeval *tv, const struct timezone *tz);
 #if defined(__ARMCC_VERSION) || defined (__ICCARM__)
 struct tm *gmtime_r(const time_t *timep, struct tm *r);
+struct tm* localtime_r(const time_t* t, struct tm* r);
+char* asctime_r(const struct tm *t, char *buf);
+char *ctime_r(const time_t * tim_p, char * result);
 #elif defined(_WIN32)
 struct tm* gmtime_r(const time_t* timep, struct tm* r);
 struct tm* gmtime(const time_t* t);
@@ -84,7 +97,7 @@ time_t time(time_t* t);
 int nanosleep(const struct timespec *rqtp, struct timespec *rmtp);
 #endif /* RT_USING_POSIX_DELAY */
 
-#ifdef RT_USING_POSIX_CLOCK
+#if defined(RT_USING_POSIX_CLOCK) || defined (RT_USING_POSIX_TIMER)
 /* POSIX clock and timer */
 #define MILLISECOND_PER_SECOND  1000UL
 #define MICROSECOND_PER_SECOND  1000000UL
@@ -110,7 +123,9 @@ int nanosleep(const struct timespec *rqtp, struct timespec *rmtp);
 #ifndef CLOCK_MONOTONIC
 #define CLOCK_MONOTONIC     4
 #endif
+#endif /* defined(RT_USING_POSIX_CLOCK) || defined (RT_USING_POSIX_TIMER) */
 
+#ifdef RT_USING_POSIX_CLOCK
 int clock_getres  (clockid_t clockid, struct timespec *res);
 int clock_gettime (clockid_t clockid, struct timespec *tp);
 int clock_settime (clockid_t clockid, const struct timespec *tp);
@@ -118,6 +133,16 @@ int clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp, s
 int rt_timespec_to_tick(const struct timespec *time);
 #endif /* RT_USING_POSIX_CLOCK */
 
+#ifdef RT_USING_POSIX_TIMER
+#include "signal.h"
+int timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid);
+int timer_delete(timer_t timerid);
+int timer_getoverrun(timer_t timerid);
+int timer_gettime(timer_t timerid, struct itimerspec *its);
+int timer_settime(timer_t timerid, int flags, const struct itimerspec *value,
+                  struct itimerspec *ovalue);
+#endif /* RT_USING_POSIX_TIMER */
+
 /* timezone */
 void tz_set(int8_t tz);
 int8_t tz_get(void);