kandi X-RAY | boost Summary
kandi X-RAY | boost Summary
Boost includes a Maven and Gradle plugin to make it easier to build your MicroProfile applications. There are two, separate active Boost projects. with a Boost Gradle project under development.
Top functions reviewed by kandi - BETA
- Package Liberty server
- Generate the Liberty server config
- Writes the server xml and bootstrap xml
- Executes the command to encrypt the property value
- Package the Tome server
- Adds jars to the shared library
- Add server
- Adds a new data source
- Retrieves the value from the MP health check
- Returns the supported JDBC feature
- Returns the value of the MPMetricVersion property
- Returns the feature version of the MPP application
- Extracts the artifact
- Generate server xml
- Checks if the given JAR is a Liberty JAR
- Gets the dependencies
- Get the dependencies
- Generate boost variables XML
- Add keystore entry
- Gets the MPSTC client feature
boost Key Features
boost Examples and Code Snippets
Trending Discussions on boost
In C++20, we got the capability to sleep on atomic variables, waiting for their value to change.
We do so by using the
wait has been standardized,
wait_until are not. Meaning that we cannot sleep on an atomic variable with a timeout.
Working around the above problem (no way to sleep on an atomic variable with a timeout), I could pass the memory address of an
WaitOnAddress on Windows and it will (kinda) work with no UB, as the function gets
void* as a parameter, and it's valid to cast
On Linux, it is unclear whether it's ok to mix
futex gets either a
uint32_t* or a
int32_t* (depending which manual you read), and casting
u/int* is UB. On the other hand, the manual says
The uaddr argument points to the futex word. On all platforms, futexes are four-byte integers that must be aligned on a four- byte boundary. The operation to perform on the futex is specified in the futex_op argument; val is a value whose meaning and purpose depends on futex_op.
alignas(4) std::atomic should work, and it doesn't matter which integer type is it is as long as the type has the size of 4 bytes and the alignment of 4.
So what is the best way to sleep on an atomic variable with a timeout in a non UB way? Do we have to implement our own atomic class with OS primitives to achieve it correctly?
(Solutions like mixing atomics and condition variables exist, but sub-optimal)...
ANSWERAnswered 2021-Jun-15 at 20:48
You shouldn't necessarily have to implement a full custom
atomic API, it should actually be safe to simply pull out a pointer to the underlying data from the
atomic and pass it to the system.
std::atomic does not offer some equivalent of
native_handle like other synchronization primitives offer, you're going to be stuck doing some implementation-specific hacks to try to get it to interface with the native API.
For the most part, it's reasonably safe to assume that first member of these types in implementations will be the same as the
T type -- at least for integral values . This is an assurance that will make it possible to extract out this value.
... and casting
This isn't actually the case.
std::atomic is guaranteed by the standard to be Standard-Layout Type. One helpful but often esoteric properties of standard layout types is that it is safe to
T to a value or reference of the first sub-object (e.g. the first member of the
As long as we can guarantee that the
std::atomic contains only the
u/int as a member (or at least, as its first member), then it's completely safe to extract out the type in this manner:
I've been attempting to create a node class which mimics a node on a graph. Currently, storage of the predecessor and successor nodes are stored via a node pointer vector:
std::vector previous. The vectors for the predecessor/successor nodes are private variables and are accessible via setters/getters.
Currently, I am dealing with updating the pointer values when adding a new node. My current method to update the predecessor/successor nodes is through this method (the method is the same for successor/previous nodes, just name changes):...
ANSWERAnswered 2021-Jun-15 at 20:20
I think this should get you going (edge-cases left to you to figure out, if any):
I am using boost (version 1.70.0) property tree. Is there a way to convert a node to XML string including the node itself, not just node's children?
If I have this XML:...
ANSWERAnswered 2021-Jun-14 at 20:24
You can create a helper property tree to hold nothing but the extracted one. This involves some additional copying, but should otherwise work just fine:
I've been tasked with porting a piece of legacy software and the client has decided they want to update Boost from 1.34 to 1.75 in the process.
Unfortunately, I'm having this issue show up when compiling:...
ANSWERAnswered 2021-Jun-09 at 10:17
I think this is a conflict with third-party headers which we've seen before here:
In that case reordering the includes worked out. If that doesn't work in your situation, you should work out which library is to blame (usually its the one that contaminates global namespace with (macro) definitions).
And then you can report the defect to the respective maintainers.
I'm following JetBrains's tutorial on an Apple Silicon computer. I installed boost with MacPorts (sudo port install boost), the version is 1.71 The build of tests.cpp file fails with the following error:...
ANSWERAnswered 2021-Jan-03 at 12:57
I have csv file: Lets call it product.csv...
ANSWERAnswered 2021-Jun-13 at 20:31
I don't think you have O(n) complexity, but a O(n^2), which means that for 100k lines your code will run for 220 minutes, not 22. What makes it worse is that you are reading the file each time you call findPreviousProduct. I would suggest first loading csv into memory and then searching it:
I am using laravel framework to check if it mobile using helper.php, but i get sometimes errors in laravel.log with: Undefined index: HTTP_USER_AGENT
My Code helper.php code:...
ANSWERAnswered 2021-Jun-14 at 05:54
It is because, there is no case if it is NULL for HTTP_USER_AGENT you can modify:
I have a complicated Elasticsearch query like the following example. This query has two sub queries: a weighted bool query and a decay function. I am trying to understand how Elasticsearch aggregrates the scores from each sub queries. If I run the first sub query alone (the weighted bool query), my top score is 20. If I run the second sub query alone (the decay function), my score is 1. However, if I run both sub queries together, my top score is 15. Can someone explain this?
My second related question is how to weight the scores from the two sub queries?...
ANSWERAnswered 2021-Jun-13 at 15:43
I found the answer myself by reading the elasticsearch document on the usage of function_score.
function_score has a parameter
boost_mode that specifies how query score and function score are combined. By default,
boost_mode is set to
Besides the default
multiply method, we could also set
avg, and add a parameter
weight to the above decay function
exp, then the combined score will be:
( the_bool_query_score + the_decay_function_score * weight ) / ( 1 + weight ).
Problem: I have a class (PortableFoo) designed to be very portable. It contains a scoped class PortableBar. The surrounding codebase (call it Client A) requires both Foo and Bar to have a function that cannot be implemented portably, and Foo's implementation must call Bar's implementation. The following is a solution that compiles and works in GCC, but I know invokes undefined behavior when it casts the reference from base to derived:...
ANSWERAnswered 2021-Jun-11 at 17:37
Is it possible to convert Base& to Derived& without object copying or undefined behavior?
Yes, it is possible on a condition that the base reference refers to a base sub object of dynamic type
Derived. A minimal example:
I have a function that returns
boost::asio::awaitable. What is the idiomatic way to convert this awaitable to
ANSWERAnswered 2021-Jun-12 at 18:00
Before we get into the answer, be warned:
You should not, under any circumstance,
wait() a future to a
boost::asio::awaitable from the same thread as the executor that is running the coroutine.
That being said.
That third parameter to
co_spawn(), the one almost every example blindly sets to the magic
detached constant? Its role is to tell
boost::asio what to do once the coroutine has finished.
detached simply means "do nothing". So the canonical way to fulfil a future from an
awaitable<> should be via that mechanism.
Thankfully, asio already provides the
use_future completion token. Pass that as the third parameter to
co_spawn() and it will return a
std::future<> of the matching return type.
No vulnerabilities reported
You can use boost like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the boost component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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