!14 修复WorkerId类型问题，添加多实例控制

* changed WorkerId from uint8_t to uint16_t
* Merge branch 'master' of https://gitee.com/laoyaosu/idgenerator
* use C89 style and fix perror invalid
* Merge branch 'master' of https://gitee.com/yitter/idgenerator
* 代码优化，注释掉不用的代码
* 增加版权信息
* Merge branch 'master' of https://gitee.com/yitter/idgenerator
* Merge branch 'master' of https://gitee.com/yitter/idgenerator
* 1.php extension add more check
* update readme
* fix min_seqnumber default value
* Merge branch 'master' of https://gitee.com/yitter/idgenerator
* fmt v code
* update php&vlang readme file
* Merge branch 'master' of https://gitee.com/yitter/idgenerator
* Merge branch 'master' of https://gitee.com/yitter/idgenerator
* 更严格的默认配置
* fix worker max num
* changed property num named wid_num
* Merge branch 'master' of https://gitee.com/yitter/idgenerator
* 修复MaxSeqNumber判断
* Merge branch 'master' of https://gitee.com/yitter/idgenerator
* fix init return
* Merge branch 'master' of https://gitee.com/yitter/idgenerator
* add README.md
* always lock
* fix shared memory addr
* use share memory
* fix malloc
* add make file
* add php ext
* Merge branch 'master' of https://gitee.com/yitter/idgenerator
* Merge branch 'master' of https://gitee.com/yitter/idgenerator
* Merge branch 'master' of https://gitee.com/yitter/idgenerator
* Merge branch 'master' of https://gitee.com/yitter/idgenerator
* Merge branch 'master' of https://gitee.com/yitter/idgenerator
* use lock and bit operation

PHP/README.md

@@ -31,12 +31,14 @@ snowdrift.SeqBitLength=6 //序列数位长，默认值6，取值范围 [3, 21]
 snowdrift.MaxSeqNumber=0 //最大序列数（含），设置范围 [MinSeqNumber, 2^SeqBitLength-1]，默认值0，表示最大序列数取最大值（2^SeqBitLength-1]
 snowdrift.MinSeqNumber=5 //最小序列数（含），默认值5，取值范围 [5, MaxSeqNumber]，每毫秒的前5个序列数对应编号0-4是保留位，其中1-4是时间回拨相应预留位，0是手工新值预留位
 snowdrift.TopOverCostCount=2000 //最大漂移次数（含），默认2000，推荐范围 500-20000（与计算能力有关）
+
+snowdrift.Multi=0 //是否支持多WorkerId，0：不支持（可用WorkerId=snowdrift.WorkerId），1：支持(可用WorkerId=1~(2^WorkerIdBitLength-1))，默认0
 ```
 
 **函数签名**：
 ```php
-\SnowDrift::NextId(int $wid=snowdrift.WorkerId):?int //获取单个id，$wid可选，默认值=snowdrift.WorkerId
-\SnowDrift::NextNumId(int $num, int $wid=snowdrift.WorkerId):?array //获取$num个id，$wid可选，默认值=snowdrift.WorkerId
+\SnowDrift::NextId(int $wid=snowdrift.WorkerId):?int //获取单个id，$wid可选，默认值=snowdrift.WorkerId，snowdrift.Multi=0情况下会忽略此参数
+\SnowDrift::NextNumId(int $num, int $wid=snowdrift.WorkerId):?array //获取$num个id，$wid可选，默认值=snowdrift.WorkerId，snowdrift.Multi=0情况下会忽略此参数
 ```
 
 **调用示例**

PHP/php_snowdrift.h

@@ -54,12 +54,13 @@ extern zend_module_entry snowdrift_module_entry;
 ZEND_BEGIN_MODULE_GLOBALS(snowdrift)
 uint8_t Method;
 uint64_t BaseTime;
-uint8_t WorkerId;
+uint16_t WorkerId;
 uint8_t WorkerIdBitLength;
 uint8_t SeqBitLength;
 uint32_t MaxSeqNumber;
 uint32_t MinSeqNumber;
 uint16_t TopOverCostCount;
+uint8_t Multi;
 
 ZEND_END_MODULE_GLOBALS(snowdrift)
 

PHP/snowdrift.c

@@ -49,38 +49,62 @@ STD_PHP_INI_ENTRY("snowdrift.SeqBitLength", "6", PHP_INI_SYSTEM, OnUpdateLongGEZ
 STD_PHP_INI_ENTRY("snowdrift.MaxSeqNumber", "0", PHP_INI_SYSTEM, OnUpdateLongGEZero, MaxSeqNumber, zend_snowdrift_globals, snowdrift_globals)
 STD_PHP_INI_ENTRY("snowdrift.MinSeqNumber", "5", PHP_INI_SYSTEM, OnUpdateLongGEZero, MinSeqNumber, zend_snowdrift_globals, snowdrift_globals)
 STD_PHP_INI_ENTRY("snowdrift.TopOverCostCount", "2000", PHP_INI_SYSTEM, OnUpdateLongGEZero, TopOverCostCount, zend_snowdrift_globals, snowdrift_globals)
+STD_PHP_INI_ENTRY("snowdrift.Multi", "0", PHP_INI_SYSTEM, OnUpdateLongGEZero, Multi, zend_snowdrift_globals, snowdrift_globals)
 PHP_INI_END()
 
 /* }}} */
 
 static int snowdrift_init()
 {
-  wid_num = (-1L << SD_G(WorkerIdBitLength)) ^ -1L;
-  shmctx.size = wid_num * sizeof(snowflake);
-  if (shm_alloc(&shmctx) == -1)
+  if (SD_G(MaxSeqNumber) != 0 && SD_G(MaxSeqNumber) < SD_G(MinSeqNumber))
   {
     return FAILURE;
   }
-  if (SD_G(MaxSeqNumber) != 0 && SD_G(MaxSeqNumber) < SD_G(MinSeqNumber))
+  wid_num = (-1L << SD_G(WorkerIdBitLength)) ^ -1L;
+  if (SD_G(Multi) > 0)
   {
-    return FAILURE;
+    shmctx.size = wid_num * sizeof(snowflake);
+    if (shm_alloc(&shmctx) == -1)
+    {
+      return FAILURE;
+    }
+    bzero(shmctx.addr, wid_num * sizeof(snowflake));
+    sf = (snowflake *)shmctx.addr;
+    int i;
+    for (i = 0; i < wid_num; i++)
+    {
+      snowflake *tmp = (sf + i);
+      tmp->Method = SD_G(Method);
+      tmp->BaseTime = SD_G(BaseTime);
+      tmp->WorkerId = i + 1;
+      tmp->WorkerIdBitLength = SD_G(WorkerIdBitLength);
+      tmp->SeqBitLength = SD_G(SeqBitLength);
+      tmp->MaxSeqNumber = SD_G(MaxSeqNumber);
+      tmp->MinSeqNumber = SD_G(MinSeqNumber);
+      tmp->TopOverCostCount = SD_G(TopOverCostCount);
+      Config(tmp);
+    }
   }
-  bzero(shmctx.addr, wid_num * sizeof(snowflake));
-  sf = (snowflake *)shmctx.addr;
-  int i;
-  for (i = 0; i < wid_num; i++)
+  else
   {
-    snowflake *tmp = (sf + i);
-    tmp->Method = SD_G(Method);
-    tmp->BaseTime = SD_G(BaseTime);
-    tmp->WorkerId = i + 1;
-    tmp->WorkerIdBitLength = SD_G(WorkerIdBitLength);
-    tmp->SeqBitLength = SD_G(SeqBitLength);
-    tmp->MaxSeqNumber = SD_G(MaxSeqNumber);
-    tmp->MinSeqNumber = SD_G(MinSeqNumber);
-    tmp->TopOverCostCount = SD_G(TopOverCostCount);
-    Config(tmp);
+    shmctx.size = sizeof(snowflake);
+    if (shm_alloc(&shmctx) == -1)
+    {
+      return FAILURE;
+    }
+    bzero(shmctx.addr, sizeof(snowflake));
+    sf = (snowflake *)shmctx.addr;
+    sf->Method = SD_G(Method);
+    sf->BaseTime = SD_G(BaseTime);
+    sf->WorkerId = SD_G(WorkerId);
+    sf->WorkerIdBitLength = SD_G(WorkerIdBitLength);
+    sf->SeqBitLength = SD_G(SeqBitLength);
+    sf->MaxSeqNumber = SD_G(MaxSeqNumber);
+    sf->MinSeqNumber = SD_G(MinSeqNumber);
+    sf->TopOverCostCount = SD_G(TopOverCostCount);
+    Config(sf);
   }
+
   return SUCCESS;
 }
 
@@ -91,13 +115,22 @@ PHP_METHOD(snowdrift, NextId)
   {
     RETURN_FALSE;
   }
-  wid--;
-  if (wid < 0 || wid > wid_num)
+  snowflake *flake;
+  if (SD_G(Multi) == 0)
   {
-    zend_throw_exception_ex(NULL, 0, "wid error! wid between 1 and %d", wid_num);
-    RETURN_NULL();
+    flake = sf;
   }
-  snowflake *flake = (sf + wid);
+  else
+  {
+    wid--;
+    if (wid < 0 || wid > wid_num)
+    {
+      zend_throw_exception_ex(NULL, 0, "wid error! wid between 1 and %d", wid_num);
+      RETURN_NULL();
+    }
+    flake = (sf + wid);
+  }
+
   RETURN_LONG(NextId(flake));
 }
 
@@ -109,13 +142,22 @@ PHP_METHOD(snowdrift, NextNumId)
   {
     RETURN_FALSE;
   }
-  wid--;
-  if (wid < 0 || wid > wid_num)
+  snowflake *flake;
+  if (SD_G(Multi) == 0)
   {
-    zend_throw_exception_ex(NULL, 0, "wid error! wid between 1 and %d", wid_num);
-    RETURN_NULL();
+    flake = sf;
   }
-  snowflake *flake = (sf + wid);
+  else
+  {
+    wid--;
+    if (wid < 0 || wid > wid_num)
+    {
+      zend_throw_exception_ex(NULL, 0, "wid error! wid between 1 and %d", wid_num);
+      RETURN_NULL();
+    }
+    flake = (sf + wid);
+  }
+
   array_init(return_value);
   int i;
   for (i = 0; i < num; i++)

PHP/split.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+for ($i = 0; $i < 50000; $i++) {
+    $id = \SnowDrift::NextId();
+    $seq = $id & ((1 << (int)ini_get('snowdrift.SeqBitLength')) - 1);
+    $id = $id >> (int)ini_get('snowdrift.SeqBitLength');
+    $wid = $id & ((1 << (int)ini_get('snowdrift.WorkerIdBitLength')) - 1);
+    $id = $id >> (int)ini_get('snowdrift.WorkerIdBitLength');
+    $time = $id;
+    echo "time:$time, wid:$wid, seq:$seq" . PHP_EOL;
+}