[Qemu-devel] [PATCH v2 11/16] [RFC] linux-user: add target_sigdelset() and target_sigorset()

[Miloš Stojanović]

Add two inline functions that work with the signal set of the target.

target_sigdelset() removes a signal from target_sigset_t.
target_sigorset() creates a union of two target_sigset_t.

These functions will be used for introducing support for tracking the
target signal set. Functions for emptying and adding into a target signal
set already exist so this commit will serve as a supplement.

Signed-off-by: Miloš Stojanović <address@hidden>
---
 linux-user/signal.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/linux-user/signal.c b/linux-user/signal.c
index 54c3be7..ae4da79 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -120,6 +120,12 @@ static inline void target_sigaddset(target_sigset_t *set, 
int signum)
     set->sig[signum / TARGET_NSIG_BPW] |= mask;
 }
 
+static inline void target_sigdelset(target_sigset_t *set, int signum)
+{
+    abi_ulong mask = (abi_ulong)1 << (--signum % TARGET_NSIG_BPW);
+    set->sig[signum / TARGET_NSIG_BPW] &= ~mask;
+}
+
 static inline int target_sigismember(const target_sigset_t *set, int signum)
 {
     signum--;
@@ -127,6 +133,16 @@ static inline int target_sigismember(const target_sigset_t 
*set, int signum)
     return ((set->sig[signum / TARGET_NSIG_BPW] & mask) != 0);
 }
 
+static inline void target_sigorset(target_sigset_t *set,
+                                   const target_sigset_t *left,
+                                   const target_sigset_t *right)
+{
+    int i;
+    for (i = 0; i < TARGET_NSIG_WORDS; i++) {
+        set->sig[i] = left->sig[i] | right->sig[i];
+    }
+}
+
 static void host_to_target_sigset_internal(target_sigset_t *d,
                                            const sigset_t *s)
 {
-- 
1.9.1