avoid all malloc/free in timer creation/destruction

instead of allocating a userspace structure for signal-based timers,
simply use the kernel timer id. we use the fact that thread pointers
will always be zero in the low bit (actually more) to encode integer
timerid values as pointers.

also, this change ensures that the timer_destroy syscall has completed
before the library timer_destroy function returns, in case it matters.

2 files changed, 2 insertions, 2 deletions

diff --git a/arch/i386/bits/alltypes.h.sh b/arch/i386/bits/alltypes.h.sh
index 13658cc2..c6201b9d 100755
--- a/arch/i386/bits/alltypes.h.sh
+++ b/arch/i386/bits/alltypes.h.sh
@@ -107,7 +107,7 @@ TYPEDEF long long blkcnt_t;
 TYPEDEF unsigned long long fsblkcnt_t;
 TYPEDEF unsigned long long fsfilcnt_t;
 
-TYPEDEF struct __timer * timer_t;
+TYPEDEF void * timer_t;
 TYPEDEF int clockid_t;
 TYPEDEF unsigned long clock_t;
 
diff --git a/arch/x86_64/bits/alltypes.h.sh b/arch/x86_64/bits/alltypes.h.sh
index cd84a2da..b0aecd9c 100755
--- a/arch/x86_64/bits/alltypes.h.sh
+++ b/arch/x86_64/bits/alltypes.h.sh
@@ -107,7 +107,7 @@ TYPEDEF long long blkcnt_t;
 TYPEDEF unsigned long long fsblkcnt_t;
 TYPEDEF unsigned long long fsfilcnt_t;
 
-TYPEDEF struct __timer * timer_t;
+TYPEDEF void * timer_t;
 TYPEDEF int clockid_t;
 TYPEDEF long clock_t;