threads: implement support for pthread_condattr (#320)

Author: loganek

Makefile

@@ -192,6 +192,10 @@ LIBC_TOP_HALF_MUSL_SOURCES += \
     $(addprefix $(LIBC_TOP_HALF_MUSL_SRC_DIR)/, \
         thread/__wait.c \
         thread/__timedwait.c \
+        thread/pthread_condattr_destroy.c \
+        thread/pthread_condattr_init.c \
+        thread/pthread_condattr_setclock.c \
+        thread/pthread_condattr_setpshared.c \
         thread/pthread_cleanup_push.c \
         thread/pthread_mutex_consistent.c \
         thread/pthread_mutex_destroy.c \
@@ -264,6 +268,9 @@ ifeq ($(THREAD_MODEL), posix)
 # Specify the tls-model until LLVM 15 is released (which should contain
 # https://reviews.llvm.org/D130053).
 CFLAGS += -mthread-model posix -pthread -ftls-model=local-exec
+
+# Include cloudlib's directory to access the structure definition of clockid_t
+CFLAGS += -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC)
 endif
 
 # Expose the public headers to the implementation. We use `-isystem` for

expected/wasm32-wasi/posix/defined-symbols.txt

@@ -930,6 +930,10 @@ program_invocation_name
 program_invocation_short_name
 pselect
 psignal
+pthread_condattr_destroy
+pthread_condattr_init
+pthread_condattr_setclock
+pthread_condattr_setpshared
 pthread_mutex_consistent
 pthread_mutex_destroy
 pthread_mutex_getprioceiling

libc-top-half/musl/src/thread/pthread_condattr_setclock.c

@@ -1,9 +1,21 @@
 #include "pthread_impl.h"
 
+#ifndef __wasilibc_unmodified_upstream
+#include <common/clock.h>
+#endif
+
 int pthread_condattr_setclock(pthread_condattr_t *a, clockid_t clk)
 {
+#ifdef __wasilibc_unmodified_upstream
 	if (clk < 0 || clk-2U < 2) return EINVAL;
+#else
+	if (clk->id < 0 || clk->id-2U < 2) return EINVAL;
+#endif
 	a->__attr &= 0x80000000;
+#ifdef __wasilibc_unmodified_upstream
 	a->__attr |= clk;
+#else
+	a->__attr |= clk->id;
+#endif
 	return 0;
 }