[RFC] Add ext-user_cache bundled extension

ext/pcntl/pcntl.c

@@ -29,6 +29,7 @@
 #include "ext/standard/info.h"
 #include "ext/standard/php_filestat.h"
 #include "php_signal.h"
+#include "ext/user_cache/php_user_cache.h"
 #include "php_ticks.h"
 #include "zend_exceptions.h"
 #include "zend_fibers.h"
@@ -271,8 +272,12 @@ PHP_FUNCTION(pcntl_fork)
 
 	ZEND_PARSE_PARAMETERS_NONE();
 
+	php_ucache_fork_prepare();
+
 	id = fork();
 	if (id == -1) {
+		php_ucache_fork_cancel();
+
 		PCNTL_G(last_error) = errno;
 		switch (errno) {
 			case EAGAIN:
@@ -1586,9 +1591,13 @@ PHP_FUNCTION(pcntl_rfork)
 	}
 #endif
 
+	php_ucache_fork_prepare();
+
 	pid = rfork(flags);
 
 	if (pid == -1) {
+		php_ucache_fork_cancel();
+
 		PCNTL_G(last_error) = errno;
 		switch (errno) {
 			case EAGAIN:
@@ -1626,9 +1635,13 @@ PHP_FUNCTION(pcntl_forkx)
 		RETURN_THROWS();
 	}
 
+	php_ucache_fork_prepare();
+
 	pid = forkx(flags);
 
 	if (pid == -1) {
+		php_ucache_fork_cancel();
+
 		PCNTL_G(last_error) = errno;
 		switch (errno) {
 			case EAGAIN:

ext/random/engine_xoshiro256starstar.c

@@ -25,16 +25,6 @@
 
 #include "Zend/zend_exceptions.h"
 
-static inline uint64_t splitmix64(uint64_t *seed)
-{
-	uint64_t r;
-
-	r = (*seed += 0x9e3779b97f4a7c15ULL);
-	r = (r ^ (r >> 30)) * 0xbf58476d1ce4e5b9ULL;
-	r = (r ^ (r >> 27)) * 0x94d049bb133111ebULL;
-	return (r ^ (r >> 31));
-}
-
 ZEND_ATTRIBUTE_CONST static inline uint64_t rotl(const uint64_t x, int k)
 {
 	return (x << k) | (x >> (64 - k));
@@ -92,10 +82,10 @@ PHPAPI inline void php_random_xoshiro256starstar_seed64(php_random_status_state_
 {
 	uint64_t s[4];
 
-	s[0] = splitmix64(&seed);
-	s[1] = splitmix64(&seed);
-	s[2] = splitmix64(&seed);
-	s[3] = splitmix64(&seed);
+	s[0] = php_random_splitmix64(&seed);
+	s[1] = php_random_splitmix64(&seed);
+	s[2] = php_random_splitmix64(&seed);
+	s[3] = php_random_splitmix64(&seed);
 
 	php_random_xoshiro256starstar_seed256(state, s[0], s[1], s[2], s[3]);
 }

ext/random/php_random.h

@@ -140,6 +140,19 @@ static inline zend_long GENERATE_SEED(void)
 	return (zend_long)php_random_generate_fallback_seed();
 }
 
+static zend_always_inline uint64_t php_random_splitmix64_mix(uint64_t z)
+{
+	z = (z ^ (z >> 30)) * UINT64_C(0xbf58476d1ce4e5b9);
+	z = (z ^ (z >> 27)) * UINT64_C(0x94d049bb133111eb);
+
+	return z ^ (z >> 31);
+}
+
+static zend_always_inline uint64_t php_random_splitmix64(uint64_t *seed)
+{
+	return php_random_splitmix64_mix(*seed += UINT64_C(0x9e3779b97f4a7c15));
+}
+
 PHPAPI void *php_random_status_alloc(const php_random_algo *algo, const bool persistent);
 PHPAPI void *php_random_status_copy(const php_random_algo *algo, void *old_status, void *new_status);
 PHPAPI void php_random_status_free(void *status, const bool persistent);